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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