Food labels multiply, some confuse consumers

FRESNO, Calif. (AP) — Want to avoid pesticides and antibiotics in your produce, meat, and dairy foods? Prefer to pay more to make sure farm animals were treated humanely, farmworkers got their lunch breaks, bees or birds were protected by the farmer and that ranchers didn't kill predators?

Food labels claim to certify a wide array of sustainable practices. Hundreds of so-called eco-labels have cropped up in recent years, with more introduced every month — and consumers are willing to pay extra for products that feature them.

While eco-labels can play a vital role, experts say their rapid proliferation and lack of oversight or clear standards have confused both consumers and producers.

"Hundreds of eco labels exist on all kinds of products, and there is the potential for companies and producers to make false claims," said Shana Starobin, a food label expert at Duke University's Nicholas School of the Environment.

Eco-labels have multiplied in recent years in response to rising consumer demand for more information about products and increased attention to animal and farmworker welfare, personal health, and the effects of conventional farming on the environment.

"Credible labels can be very helpful in helping people get to what they want to get to and pay more for something they really care about," said Urvashi Rangan, director of consumer safety at Consumer Reports. "The labels are a way to bring the bottom up and force whole industries to improve their practices."

The problem, Rangan and other said, is that few standards, little oversight and a lot of misinformation exist for the growing array of labels.

Some labels, such as the USDA organic certification, have standards set by the federal government to which third party certifiers must adhere. Some involve non-government standards and third-party certification, and may include site visits from independent auditors who evaluate whether a given farm or company has earned the label.

But other labels have little or no standards, or are certified by unknown organizations or by self-interested industry groups. Many labels lack any oversight.

And the problem is global, because California's products get sold overseas and fruits and vegetables from Europe or Mexico with their own eco-labels make it onto U.S. plates.

The sheer number of labels and the lack of oversight create a credibility problem and risk rendering all labels meaningless and diluting demand for sustainably produced goods, Rangan said.

Daniel Mourad of Fresno, a young professional who likes to cook and often shops for groceries at Whole Foods, said he tends to be wary of judging products just by the labels — though sustainable practices are important to him.

"Labels have really confused the public. Some have good intentions, but I don't know if they're really helpful," Mourad said. "Organic may come from Chile, but what does it mean if it's coming from 6,000 miles away? Some local farmers may not be able to afford a label."

In California, voters this week rejected a ballot measure that would have required labels on foods containing genetically modified ingredients.

Farmers like Gena Nonini in Fresno County say labels distinguish them from the competition. Nonini's 100-acre Marian Farms, which grows grapes, almonds, citrus and vegetables, is certified biodynamic and organic, and her raisins are certified kosher.

"For me, the certification is one way of educating people," Nonini said. "It opens a venue to tell a story and to set yourself apart from other farmers out there."

But other farmers say they are reluctant to spend money on yet another certification process or to clutter their product with too much packaging and information.

"I think if we keep adding all these new labels, it tends to be a pile of confusion," said Tom Willey of TD Willey Farms in Madera, Calif. His 75-acre farm, which grows more than 40 different vegetable crops, carries USDA organic certification, but no other labels.

The proliferation of labels, Willey said, is a poor substitute for "people being intimate with the farmers who grow their food." Instead of seeking out more labels, he said, consumers should visit a farmers' market or a farm, and talk directly to the grower.

Since that's still impossible for many urbanites, Consumer Reports has developed a rating system, a database and a web site for evaluating environmental and food labels — one of several such guides that have popped up recently to help consumers.

The guides show that labels such as "natural" and "free range" carry little meaning, because they lack clear standards or a verification system.

Despite this, consumers are willing to pay more for "free range" eggs and poultry, and studies show they value "natural" over "organic," which is governed by lengthy federal regulations.

But some consumers and watchdog groups are becoming more vigilant.

In October, the Animal Legal Defense Fund filed a lawsuit against Petaluma, Calif., organic egg producer of Judy's Eggs over "free range" claims. The company's packaging depicts a hen ranging on green grass, and the inside reads "these hens are raised in wide open spaces in Sonoma Valley..."

Aerial photos of the farm suggest the chickens actually live in factory-style sheds, according to the lawsuit. Judy and Steve Mahrt, owners of Petaluma Farms, said in a statement that the suit is "frivolous, unfair and untrue," but they did not comment on the specific allegations.

Meanwhile, new labels are popping up rapidly. The Food Justice label, certified via third party audits, guarantees a farm's commitment to fair living wages and adequate living and working conditions for farmworkers. And Wildlife Friendly, another third-party audited program, certifies farmers and ranchers who peacefully co-exist with wolves, coyotes, foxes and other predators.

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Follow Gosia Wozniacka at http://twitter.com/GosiaWozniacka

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Obama hails veterans, pledges continued support

ARLINGTON, Virginia (Reuters) - President Barack Obama laid a wreath at the Tomb of the Unknown Soldier to mark the Veterans Day holiday on Sunday, declaring that soldiers' needs would be met even as the country winds down wars in the Middle East and Asia.

In the ceremony at Arlington National Cemetery, Obama pledged continuing support for veterans as they make the transition to civilian life.

"This is the first Veterans Day in a decade in which there are no American troops fighting and dying in Iraq," the president said at the cemetery across the Potomac River from Washington, where soldiers' graves are marked with row upon row of simple white stones.

"After a decade of war, our heroes are coming home," he said. "Over the next few years more than a million service members will transition back to civilian life."

The president touted the work of first lady Michelle Obama and Jill Biden, wife of Vice President Joe Biden, for their work in the Joining Forces campaign, which urges businesses to hire veterans. He also reaffirmed his commitment to continuing the post-9/11 GI Bill program, which provides college education funding for those who have served, and said soldiers suffering war-related health problems will get the care they need.

"No one who fights for this country overseas should ever have to fight for a job, or a roof over their head, or the care that they have earned when they come home," he said.

After the ceremony, Obama visited with people in an area of the cemetery known as Section 60, where many of the solders who died in the Iraq and Afghanistan wars are buried.

The Democratic president won re-election to a second four-year term on Tuesday and now faces tough negotiations with Republican congressional leaders to avoid sharp spending cuts that loom at the end of the year. A big chunk of those reductions would come through a decline in defense spending.

During the campaign, Obama and Biden regularly pledged their commitment to bringing troops home from Afghanistan and taking care of American veterans. Obama criticized his opponent, Republican Mitt Romney, for failing to mention the war in Afghanistan during his speech to the Republican National Convention.

(Reporting by Samson Reiny, writing by Mark Felsenthal; Editing by Doina Chiacu)

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US computer graphics scientist wins Kyoto Prize

TOKYO (AP) — An American regarded as a father of computer graphics, an Indian literary critic and a Japanese molecular cell biologist have received the Kyoto Prize, Japan's highest private award for global achievement.

The Inamori Foundation awarded its advanced technology prize on Saturday to U.S. computer scientist Ivan Sutherland, who developed the graphic interface program Sketchpad in 1963.

Gayatri Chakrovoty Spivak , an Indian literary critic and professor at Columbia University, won the arts and philosophy prize.

Yoshinori Ohsumi, a molecular biologist at the Tokyo Institute of Technology, received the basic sciences prize for his work on autophagy, a cell-recycling system that could be used to help treat neurodegenerative and age-related diseases such as Alzheimer's and cancer.

The Kyoto-based Inamori Foundation was set up in 1984 by Kyocera Corp.'s founder, Kazuo Inamori.

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War photography exhibit debuts in Houston museum

HOUSTON (AP) — It was a moment Nina Berman did not expect to capture when she entered an Illinois wedding studio in 2006. She knew Tyler Ziegel had been horribly injured, his face mutilated beyond recognition by a suicide bombing in the Iraq War. She knew he was marrying his pretty high school sweetheart, perfect in a white, voluminous dress.

It was their expressions that were surprising.

"People don't think this war has any impact on Americans? Well here it is," Berman says of the image of a somber bride staring blankly, unsmiling at the camera, her war-ravaged groom alongside her, his head down.

"This was even more shocking because we're used to this kind of over-the-top joy that feels a little put on, and then you see this picture where they look like survivors of something really serious," Berman added.

The photograph that won a first place prize in the World Press Photos Award contest will stand out from other battlefield images in an exhibit "WAR/PHOTOGRAPHY: Images of Armed Conflict and Its Aftermath" that debuts Sunday — Veterans Day — in the Houston Museum of Fine Arts. From there, the exhibit will travel to The Annenberg Space for Photography in Los Angeles, the Corcoran Gallery of Art in Washington and The Brooklyn Museum in Brooklyn, N.Y.

The exhibit was painstakingly built by co-curators Anne Wilkes Tucker and Will Michels after the museum purchased a print of the famous picture of the raising of the flag at Iwo Jima, taken Feb. 23, 1945, by Associated Press photographer Joe Rosenthal. The curators decided the museum didn't have enough conflict photos, Tucker said, and in 2004, the pair began traveling around the country and the world in search of pictures.

Over nearly eight years and after viewing more than 1 million pictures, Tucker and Michels created an exhibit that includes 480 objects, including photo albums, original magazines and old cameras, by 280 photographers from 26 countries.

Some are well-known — such as the Rosenthal's picture and another AP photograph, of a naked girl running from a napalm attack during the Vietnam War taken in 1972 by Huynh Cong "Nick" Ut. Others, such as the Incinerated Iraqi, of a man's burned body seen through the shattered windshield of his car, will be new to most viewers.

"The point of all the photographs is that when a conflict occurs, it lingers," Tucker said.

The pictures hang on stark gray walls, and some are in small rooms with warning signs at the entrance designed to allow visitors to decide whether they want to view images that can be brutal in their honesty.

"It's something that we did to that man. Americans did it, we did it intentionally and it's a haunting picture," Michels said of the image of the burned Iraqi that hangs inside one of the rooms.

In some images, such as Don McCullin's picture of a U.S. Marine throwing a grenade at a North Vietnamese soldier in Hue, it is clear the photographer was in danger when immortalizing the moment. Looking at his image, McCullin recalled deciding to travel to Hue instead of Khe Sahn, as he had initially planned.

"It was the best decision I ever made," he said, smiling slightly as he looked at the picture, explaining that he took a risk by standing behind the Marine.

"This hand took a bullet, shattered it. It looked like a cauliflower," he said, pointing to the still-upraised hand that threw the grenade. "So the people he was trying to kill were trying to kill him."

McCullin, who worked at that time for The Sunday Times in London, has covered conflicts all over the world, from Lebanon and Israel to Biafra. Now 77, McCullin says he wonders, still, whether the hundreds of photos he's taken have been worthwhile. At times, he said, he lost faith in what he was doing because when one war ends, another begins.

Yet he believes journalists and photographers must never stop telling about the "waste of man in war."

"After seeing so much of it, I'm tired of thinking, 'Why aren't the people who rule our lives ... getting it?' " McCullin said, adding that he'd like to drag them all into the exhibit for an hour.

Berman didn't see the conflicts unfold. Instead, she waited for the wounded to come home, seeking to tell a story about war's aftermath.

Her project on the wounded developed in 2003. The Iraq War was at its height, and there was still no database, she said, to find names of wounded warriors returning home. So she scoured local newspapers on the Internet.

In 2004 she published a book called "Purple Hearts" that includes photographs taken over nine months of 20 different people. All were photographed at home, not in hospitals where, she said, "there's this expectation that this will all work out fine."

The curators, meanwhile, chose to tell the story objectively — refusing through the images they chose or the exhibit they prepared to take a pro- or anti-war stance, a decision that has invited criticism and sparked debate.

And maybe, that is the point.

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Plushnick-Masti can be followed on Twitter at https://twitter.com/RamitMastiAP

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Malaria vaccine a letdown for infants

LONDON (AP) — An experimental malaria vaccine once thought promising is turning out to be a disappointment, with a new study showing it is only about 30 percent effective at protecting infants from the killer disease.

That is a significant drop from a study last year done in slightly older children, which suggested the vaccine cut the malaria risk by about half — though that is still far below the protection provided from most vaccines. According to details released on Friday, the three-shot regimen reduced malaria cases by about 30 percent in infants aged 6 to 12 weeks, the target age for immunization.

Dr. Jennifer Cohn, a medical coordinator at Doctors Without Borders, described the vaccine's protection levels as "unacceptably low." She was not linked to the study.

Scientists have been working for decades to develop a malaria vaccine, a complicated endeavor since the disease is caused by five different species of parasites. There has never been an effective vaccine against a parasite. Worldwide, there are several dozen malaria vaccine candidates being researched.

In 2006, a group of experts led by the World Health Organization said a malaria vaccine should cut the risk of severe disease and death by at least half and should last longer than one year. Malaria is spread by mosquitoes and kills more than 650,000 people every year, mostly young children and pregnant women in Africa. Without a vaccine, officials have focused on distributing insecticide-treated bed nets, spraying homes with pesticides and ensuring access to good medicines.

In the new study, scientists found babies who got three doses of the vaccine had about 30 percent fewer cases of malaria than those who didn't get immunized. The research included more than 6,500 infants in Africa. Experts also found the vaccine reduced the amount of severe malaria by about 26 percent, up to 14 months after the babies were immunized.

Scientists said they needed to analyze the data further to understand why the vaccine may be working differently in different regions. For example, babies born in areas with high levels of malaria might inherit some antibodies from their mothers which could interfere with any vaccination.

"Maybe we should be thinking of a first-generation vaccine that is targeted only for certain children," said Dr. Salim Abdulla of the Ifakara Health Institute in Tanzania, one of the study investigators.

Results were presented at a conference in South Africa on Friday and released online by the New England Journal of Medicine. The study is scheduled to continue until 2014 and is being paid for by GlaxoSmithKline and the PATH Malaria Vaccine Initiative.

"The results look bad now, but they will probably be worse later," said Adrian Hill of Oxford University, who is developing a competing malaria vaccine. He noted the study showed the Glaxo vaccine lost its potency after several months. Hill said the vaccine might be a hard sell, compared to other vaccines like those for meningitis and pneumococcal disease — which are both effective and cheap.

"If it turns out to have a clear 30 percent efficacy, it is probably not worth it to implement this in Africa on a large scale," said Genton Blaise, a malaria expert at the Swiss Tropical and Public Health Institute in Basel, who also sits on a WHO advisory board.

Eleanor Riley of the London School of Hygiene and Tropical Medicine, said the vaccine might be useful if used together with other strategies, like bed nets. She was involved in an earlier study of the vaccine and had hoped for better results. "We're all a bit frustrated that it has proven so hard to make a malaria vaccine," she said. "The question is how much money are the funders willing to keep throwing at it."

Glaxo first developed the vaccine in 1987 and has invested $300 million in it so far.

WHO said it couldn't comment on the incomplete results and would wait until the trial was finished before drawing any conclusions.

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Four days later, Obama wins Florida

ST. PETERSBURG, Fla. - President Barack Obama was declared the winner of Florida's 29 electoral votes Saturday, ending a four-day count with a razor-thin margin that narrowly avoided an automatic recount that would have brought back memories of 2000.

No matter the outcome, Obama had already clinched re-election and now has 332 electoral votes to Romney's 206.

The Florida Secretary of State's Office said that with almost 100 per cent of the vote counted, Obama led Republican challenger Mitt Romney 50 per cent to 49.1 per cent, a difference of about 74,000 votes. That was over the half-per cent margin where a computer recount would have been automatically ordered unless Romney had waived it.

There is a Nov. 16 deadline for overseas and military ballots, but under Florida law, recounts are based on Saturday's results. Only a handful of overseas and military ballots are believed to remain outstanding.

It's normal for election supervisors in Florida and other states to spend days after any election counting absentee, provisional, military and overseas ballots. Usually, though, the election has already been called on election night or soon after because the winner's margin is beyond reach.

But on election night this year, it was difficult for officials — and the media — to call the presidential race here, in part because the margin was so close and the voting stretched into the evening.

In Miami-Dade, for instance, so many people were in line at 7 p.m. in certain precincts that some people didn't vote until after midnight.

The hours-long wait at the polls in some areas, a lengthy ballot and the fact that Gov. Rick Scott refused to extend early voting hours has led some to criticize Florida's voting process. Some officials have vowed to investigate why there were problems at the polls and how that led to a lengthy vote count.

If there had been a recount, it would not be as difficult as the lengthy one in 2000. The state no longer uses punch-card ballots, which became known for their hanging chads. All 67 counties now use optical scan ballots where voters mark their selections manually.

Republican George W. Bush won the 2000 contest after the Supreme Court declared him the winner over Democrat Al Gore by a scant 537 votes.

The win gave Obama victories in eight of the nine swing states, losing only North Carolina. In addition to Florida, he won Ohio, Iowa, New Hampshire, Wisconsin, Virginia, Colorado and Nevada.

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Transgender Pakistanis face society's scorn

RAWALPINDI, Pakistan (AP) — Dressed up in elaborate, feminine outfits and artfully applied makeup, they are showered with money while dancing at all-male wedding parties. But the lives of transgender people in Pakistan are also marked by harassment, rejection and poverty.

Transgender people live in a tenuous position in conservative Pakistan, where the roles of the sexes are traditionally starkly drawn. Families often push them out of the home when they're young, forcing many to prostitute themselves to earn a living.

One role where they are tolerated is as dancers at weddings and other celebrations at which men and women are strictly segregated. In between the dancing and showers of rupee notes, they must fend off groping from drunken guests.

"I don't understand why people feel it is their duty to tease and taunt us," said one transgender Pakistani who goes by the name Symbal. Many in the transgender community pick a name for themselves and do not use their last name to protect their family.

Others beg on the streets or earn money by blessing newborn babies. The blessings reflect a widespread belief in Pakistan and other South Asian nations that God answers the prayers of someone who was born underprivileged, said Iqbal Hussain, a Pakistani researcher who has studied the transgender community. But he cautioned that didn't mean people were ready to give them equal rights.

In recent years the community has gained some government protection. A Supreme Court ruling in 2011 allowed them to get national identity cards recognizing them as a separate identity — neither male or female — and allowing them to vote. In neighboring India, the election commission ruled in 2009 that transgender people could register to vote as "other," rather than male or female.

In other parts of the region and Muslim world, the attitude toward transgenders is also complex. In Thailand, the community is very visible and broadly tolerated. Transgender people are regularly seen on TV soap operas, working at department store cosmetics counters or popular restaurants and walking the runways in numerous transgender beauty pageants.

Many transgender Indonesians publicly wear women's clothes and makeup and work as singers. But societal disdain still runs deep. They have taken a much lower profile in recent years, following a series of attacks by Muslim hard-liners.

In Malaysia, Muslim men who wear women's clothes can be prosecuted in Islamic courts.

In the Arab world, there is little opportunity for transgender people to openly show their identity in public. In 2007, Kuwait made "imitating members of the opposite sex" a crime, leading to the arrest of hundreds of transgender women, Human Rights Watch said. In Iraq, extremists have targeted and killed people perceived of being gay or effeminate.

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Philip Roth says he's done writing

NEW YORK (AP) — Exit, Philip Roth? Having conceived everything from turning into a breast to a polio epidemic in his native New Jersey, Roth has apparently given his imagination a rest.

The 79-year-old novelist recently told a French publication, Les inRocks, that his 2010 release "Nemesis" would be his last. Spokeswoman Lori Glazer of Houghton Mifflin Harcourt said Friday that she had spoken with Roth and that he confirmed his remarks. Roth's literary agent, Andrew Wylie, declined comment.

Roth certainly produced, completing more than 20 novels over half a century and often turning out one a year. He won virtually every prize short of the Nobel and wrote such classics as "American Pastoral" and "Portnoy's Complaint."

His name will remain on new releases, if only because the Library of America has been issuing hardcover volumes of his work. Roth also is cooperating with award-winning biographer Blake Bailey on a book about his life.

The author chose an unexpected forum to break the news, but he has been hinting at his departure for years. He has said that he no longer reads fiction and seemed to say goodbye to his fictional alterego, Nathan Zuckerman, in the 2007 novel "Exit Ghost."

Retirement is rarely the preferred option for writers, for whom the ability to tell stories or at least set down words is often synonymous with life itself. Poor health, discouragement and even madness are the more likely ways literary careers end. Roth apparently is fit and his recent novels had been received respectfully, if not with the awe of his most celebrated work.

"I don't believe it," Roth's friend and fellow writer Cynthia Ozick said upon learning the news. "A writer who stops writing while still breathing has already declared herself posthumous."

His parting words from "Nemesis": "He seemed to us invincible."

Roth's interview appeared in French and has been translated, roughly, by The Associated Press. He tells Les inRocks that "Nemesis" was "mon dernier livre" ("My last book") and refers to "Howard's End" author E.M. Forster, and how he quit fiction in his 40s. Roth said he doesn't plan to write a memoir, but will instead go through his archives and help ensure that Bailey's biography comes out in his lifetime.

Explaining why he stopped, Roth said that at age 74 he became aware his time was limited and that he started re-reading his books of the past 20-30 years, in reverse order. He decided that he agreed with what the boxer Joe Louis had said late in life, that he had done the best he could with what he had.

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Malaria vaccine a letdown for infants

LONDON (AP) — An experimental malaria vaccine once thought promising is turning out to be a disappointment, with a new study showing it is only about 30 percent effective at protecting infants from the killer disease.

That is a significant drop from a study last year done in slightly older children, which suggested the vaccine cut the malaria risk by about half — though that is still far below the protection provided from most vaccines. According to details released on Friday, the three-shot regimen reduced malaria cases by about 30 percent in infants aged 6 to 12 weeks, the target age for immunization.

Dr. Jennifer Cohn, a medical coordinator at Doctors Without Borders, described the vaccine's protection levels as "unacceptably low." She was not linked to the study.

Scientists have been working for decades to develop a malaria vaccine, a complicated endeavor since the disease is caused by five different species of parasites. There has never been an effective vaccine against a parasite. Worldwide, there are several dozen malaria vaccine candidates being researched.

In 2006, a group of experts led by the World Health Organization said a malaria vaccine should cut the risk of severe disease and death by at least half and should last longer than one year. Malaria is spread by mosquitoes and kills more than 650,000 people every year, mostly young children and pregnant women in Africa. Without a vaccine, officials have focused on distributing insecticide-treated bed nets, spraying homes with pesticides and ensuring access to good medicines.

In the new study, scientists found babies who got three doses of the vaccine had about 30 percent fewer cases of malaria than those who didn't get immunized. The research included more than 6,500 infants in Africa. Experts also found the vaccine reduced the amount of severe malaria by about 26 percent, up to 14 months after the babies were immunized.

Scientists said they needed to analyze the data further to understand why the vaccine may be working differently in different regions. For example, babies born in areas with high levels of malaria might inherit some antibodies from their mothers which could interfere with any vaccination.

"Maybe we should be thinking of a first-generation vaccine that is targeted only for certain children," said Dr. Salim Abdulla of the Ifakara Health Institute in Tanzania, one of the study investigators.

Results were presented at a conference in South Africa on Friday and released online by the New England Journal of Medicine. The study is scheduled to continue until 2014 and is being paid for by GlaxoSmithKline and the PATH Malaria Vaccine Initiative.

"The results look bad now, but they will probably be worse later," said Adrian Hill of Oxford University, who is developing a competing malaria vaccine. He noted the study showed the Glaxo vaccine lost its potency after several months. Hill said the vaccine might be a hard sell, compared to other vaccines like those for meningitis and pneumococcal disease — which are both effective and cheap.

"If it turns out to have a clear 30 percent efficacy, it is probably not worth it to implement this in Africa on a large scale," said Genton Blaise, a malaria expert at the Swiss Tropical and Public Health Institute in Basel, who also sits on a WHO advisory board.

Eleanor Riley of the London School of Hygiene and Tropical Medicine, said the vaccine might be useful if used together with other strategies, like bed nets. She was involved in an earlier study of the vaccine and had hoped for better results. "We're all a bit frustrated that it has proven so hard to make a malaria vaccine," she said. "The question is how much money are the funders willing to keep throwing at it."

Glaxo first developed the vaccine in 1987 and has invested $300 million in it so far.

WHO said it couldn't comment on the incomplete results and would wait until the trial was finished before drawing any conclusions.

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CIA chief admits affair, resigns

CIA Director David Petraeus resigned his post on Friday, confessing to having shown "extremely poor judgment by engaging in an extramarital affair." The former Army general rocketed to global prominence as the man in charge of the "surge" in Iraq and later the commander of American forces in Afghanistan.

President Barack Obama said Petraeus had led the Central Intelligence Agency "with characteristic intellectual rigor, dedication and patriotism."

"I am completely confident that the CIA will continue to thrive and carry out its essential mission, and I have the utmost confidence in Acting Director Michael Morell and the men and women of the CIA who work every day to keep our nation safe," the president said in a written statement.

"Going forward, my thoughts and prayers are with Dave and Holly Petraeus, who has done so much to help military families through her own work. I wish them the very best at this difficult time," Obama continued.

Director of National Intelligence James Clapper issued a statement that did not specify a reason for Petraeus' departure but praised his colleague extensively.

"From his long, illustrious Army career to his leadership at the helm of CIA, Dave has redefined what it means to serve and sacrifice for one's country," said Clapper.

Petraeus went to work as CIA chief in September 2011 after heading up the war in Afghanistan. He had drawn fire in the aftermath of the Sept. 11 attack on the American compound in Benghazi, Libya. His departure comes barely a week before he was scheduled to testify about the assault in closed-door sessions with the intelligence committees of the Senate and House of Representatives. Morell was expected to take his place, congressional aides said.

Petraeus' resignation letter, quoted by several news outlets, centered on his personal behavior.

"Yesterday afternoon, I went to the White House and asked the President to be allowed, for personal reasons, to resign from my position as D/CIA. After being married for over 37 years, I showed extremely poor judgment by engaging in an extramarital affair. Such behavior is unacceptable, both as a husband and as the leader of an organization such as ours," he said. "This afternoon, the President graciously accepted my resignation."

Petraeus, 60, has been described as the father of the military's counterinsurgency doctrine. The charismatic officer had been cited as a possible future presidential or vice presidential prospect.

His wife, Holly, has worked inside the Obama administration, serving at the Consumer Financial Protection Bureau.

Arizona Sen. John McCain, the ranking Republican on the Senate Armed Services Committee and one of Petraeus' most outspoken admirers, said the general "will stand in the ranks of America's greatest military heroes."

"His inspirational leadership and his genius were directly responsible—after years of failure—for the success of the surge in Iraq," McCain said in a statement. "Our thoughts and prayers are with him and his family."

In a statement, Senate Intelligence Committee Chairwoman Dianne Feinstein, a Democrat, said, "I very much regret the resignation of David Petraeus. This is an enormous loss for our nation's intelligence community and for our country.

"I wish President Obama had not accepted this resignation, but I understand and respect the decision," Feinstein added.

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