U.S. President Barack Obama attends the Nuclear Security Summit in the Hague, Netherlands, in March 2014. As Obama's second term nears its close, here's a look at some key moments of his administration.
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First lady Michelle Obama brushes specks from the coat of then-Sen. Obama in Springfield, Illinois, just before he announced his candidacy for President in February 2007. Their daughters Malia, left, and Sasha wait in the foreground.
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Obama appears on "Meet the Press" with Tim Russert, right, in Des Moines, Iowa, in November 2007.
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Obama shakes hands with supporters after addressing a rally in Concord, New Hampshire, in January 2008.
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Obama gives a speech at the National Constitution Center in Philadelphia in March 2008.
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Obama speaks at the 2008 Democratic National Convention in Denver.
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Obama stands on stage in Chicago with his family after winning the presidential election on November 4, 2008.
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Obama poses in the Oval Office with several former U.S. Presidents in January 2009. From left are George H. W. Bush, Obama, George W. Bush, Bill Clinton and Jimmy Carter.