Kimmy Lankford and her 5-year-old son, Jack, walk through their neighborhood Wednesday after a massive tornado passed through the town. The Lankfords continue to live in their home a few blocks away, which was damaged but remains habitable. Mario Tama/Getty Images hide caption

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The Japan Animal Rescue shelter in Samukawa houses about 200 dogs and cats, most of them brought in from the now off-limits area around the Fukushima Dai-ichi nuclear power plant. Brian Naylor/NPR hide caption

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A man holds a placard during a march denouncing the use of nuclear plants and power during a demonstration in Tokyo on May 1. Toru Yamanaka /AFP/Getty Images hide caption

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Then-House Speaker Newt Gingrich holds up a copy of the Republican Party's "Contract with America" during a rally to celebrate the first 50 days of the Republican majority in Congress in 1995. Joshua Roberts/AFP/Getty Images hide caption

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The Deepwater Horizon oil rig burns in the Gulf of Mexico, April 21, 2010. Investigations before and after the disaster found the agency responsible for overseeing the industry quite friendly with those it regulated. Gerald Herbert/AP hide caption

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An air traffic controller drinks a cup of coffee while working in a terminal radar approach control room Monday at the Atlanta TRACON in Peachtree City, Ga. Several recent reports of controllers nodding off on the job prompted new scheduling rules. David Goldman/AP hide caption

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President Obama is focusing his review on government agencies that deal with trade and exports. Paul J. Richards/AFP/Getty Images hide caption

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Participants work on their techniques and safety procedures during a suspended-scaffolding training class in New York. Construction incurred the most fatal injuries of any industry in the private sector in 2009, according to the Labor Department. Seth Wenig/AP hide caption

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In one of the digitized images, President Kennedy sails aboard the Manitou off the coast of Maine on Aug. 12, 1962. Robert Knudsen/John F. Kennedy Presidential Library hide caption

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Passengers move through a main security checkpoint at the Denver International Airport on Nov. 22. Some airports are considering replacing government security screeners with private companies. John Moore/Getty Images hide caption

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Members of the House's incoming freshmen class walk up the steps of the Capitol to pose for a group photo on Nov. 19. Alex Brandon/AP hide caption

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Senate Majority Leader Sen. Harry Reid (D-NV) is resisting President Obama's tax cut deal. Alex Brandon/AP hide caption

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Sens. Joseph Lieberman of Connecticut (left) and Richard Durbin of Illinois (right) talk with Cesar Vargas, a law student from New York City, on Capitol Hill in September. Vargas is one of some 2 million young people who would qualify for legal residency under the DREAM Act. Alex Brandon/AP hide caption

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