Despite some differences, President Obama and Pope Francis shared a laugh during their Thursday meeting at the Vatican. Obama called himself a "great admirer" of the pope. Gabriel Bouys/AFP/Getty Images hide caption

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President Obama and other leaders met in The Hague. Clockwise from bottom left: European Union Council President Herman Van Rompuy, Canadian Prime Minister Stephen Harper, French President Francois Hollande, British Prime Minister David Cameron, Obama, German Chancellor Angela Merkel, Japanese Prime Minister Shinzo Abe, Italian Prime Minister Matteo Renzi and EU President Jose Manuel Barroso. Sean Gallup/Getty Images hide caption

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Colorado Republican Rep. Cory Gardner officially announces his candidacy for the U.S. Senate at Denver Lumber Co. on March 1. Gardner will run against Democratic incumbent Mark Udall. Chris Schneider/AP hide caption

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Russian President Vladimir Putin's actions are beyond President Obama's control, something that holds true for most of the foreign policy issues vexing the U.S. president's second term. Sergei Ilnitsky/AP hide caption

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Vietnam veterans Melvin Morris (center), Jose Rodela (obscured) and Santiago J. Erevia (left) received the Medal of Honor from President Obama at the White House on Thursday. Win McNamee/Getty Images hide caption

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