WASHINGTON, DC - MARCH 14:  (AFP OUT) U.S. President Barack Obama leaves after addressing the Chief of Missions Conference in the Dean Acheson Auditorium at the Harry S Truman State Department building March 14, 2016 in Washington, DC. Obama highlighted the work and sacrifice done by the United States' diplomatic corps and talked about his administration's accomplishments.  (Photo by Chip Somodevilla/Getty Images)