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U.S. Secretary of Defense Ash Carter speaks to troops during a question-and-answer session at Camp Arifjan on February 23, 2015 in Kuwait. (Jonathan Ernst-Pool/Getty Images)

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Anthony Trollope (Wikimedia)

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U.S. President Barack Obama at the White House February 23, 2015 in Washington, DC. (Win McNamee/Getty Images)

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The Syrian flag flying in front of the dome of the Syrian Saint Sarkis Church for Armenian Orthodox in Damascus on January 6, 2015. (LOUAI BESHARA/AFP/Getty Images)

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A marijuana advocate who goes by the name 'The Holy Hemptress' demonstrates on October 25, 2011 in San Francisco, California. (Justin Sullivan/Getty Images)

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The Keystone XL Pipeline Approval Act with the signature of Speaker of the House Rep. John Boehner (R-OH) and Sen. Orrin Hatch (R-UT) in the Rayburn Room of the Capitol February 13, 2015 on Capitol Hill in Washington, DC. (Alex Wong/Getty Images)

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The French flag flies at half mast at the Elysee Palace during a Unity rally Marche Republicaine on January 11, 2015 in Paris. (DOMINIQUE FAGET/AFP/Getty Images)