U.S. President Barack Obama greets U.S. troops deployed in Afghanistan during an unannounced visit to Bagram Air Base in Kabul, May 25 2014. REUTERS/Jonathan Ernst (AFGHANISTAN - Tags: POLITICS ... more 
U.S. President Barack Obama greets U.S. troops deployed in Afghanistan during an unannounced visit to Bagram Air Base in Kabul, May 25 2014. REUTERS/Jonathan Ernst (AFGHANISTAN - Tags: POLITICS MILITARY) less 
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Reuters | Photo By JONATHAN ERNST / REUTERS
Sun, May 25, 2014 2:06 PM EDT