U.S. President Barack Obama leaves the presidential limo upon arriving to attend the Nuclear Security summit (NSS) in The Hague March 24, 2014. The Nuclear Security Summit on March 24-25, aimed at ... more 
U.S. President Barack Obama leaves the presidential limo upon arriving to attend the Nuclear Security summit (NSS) in The Hague March 24, 2014. The Nuclear Security Summit on March 24-25, aimed at preventing nuclear terrorism, will bring together several world leaders. REUTERS/Evert-Jan Daniels/Pool (NETHERLANDS - Tags: POLITICS) less 
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Reuters | Photo By POOL / REUTERS
Mon, Mar 24, 2014 10:44 AM EDT