Republican presidential candidate Mitt Romney pauses during a visit to St. Paul's Lutheran Church while campaigning in Berlin, N.H., on Dec. 22. Charles Krupa/AP hide caption

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Many experts say reducing mortgage principal can help troubled homeowners stay in their homes. But two of the nation's largest mortgage holders, Fannie Mae and Freddie Mac, have not signed on to the idea. Justin Sullivan/Getty Images hide caption

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Then-Sen. John F. Kennedy participates in a question-and-answer session with the Ministers' Association of Greater Houston on Sept. 12, 1960, in Houston. In a speech to the group, Kennedy addressed concerns about his Catholicism and his run for the presidency. Houston Chronicle/AP hide caption

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North Korea's military fires missiles during a drill in this undated photo released Oct. 6, 2010, by the Korean Central News Agency. North Korea has agreed to stop nuclear activities and allow inspections, while the U.S. says it will provide food aid to the country. Korean Central News Agency/AP hide caption

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The Know Your Farmer interactive map shows USDA-supported projects and programs related to local and regional food systems for the years 2009-2011. USDA hide caption

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The film Act of Valor, commissioned by the Naval Special Warfare Command, uses active-duty SEALs and professional actors to tell a fictional story. Courtesy of IATM LLC/Relativity Media hide caption

itoggle caption Courtesy of IATM LLC/Relativity Media