U.S. Secretary of State John Kerry gives the thumbs up as he boards his plane in Benito Juarez International airport in Mexico City May 22, 2014, en route to Washington. REUTERS/Carolyn Kaster/Pool ... more 
U.S. Secretary of State John Kerry gives the thumbs up as he boards his plane in Benito Juarez International airport in Mexico City May 22, 2014, en route to Washington. REUTERS/Carolyn Kaster/Pool (MEXICO - Tags: POLITICS) less 
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Reuters | Photo By POOL / REUTERS
Thu, May 22, 2014 10:26 AM EDT