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WASHINGTON, DC - AUGUST 06: (L-R) Chad President Idriss Deby Itno, Benin President Boni Yayi and Cameroon President Paul Biya visit before the first plenary session of the U.S.-Africa Leaders Summit at the State Department August 6, 2014 in Washington, DC. Obama hosted last day of the first-ever summit to strengthen ties between the United States and African nations. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 06:  (L-R) Chad President Idriss Deby Itno, Benin President Boni Yayi and Cameroon President Paul Biya visit before the first plenary session of the U.S.-Africa Leaders Summit at the State Department August 6, 2014 in Washington, DC. Obama hosted last day of the first-ever summit to strengthen ties between the United States and African nations.  (Photo by Chip Somodevilla/Getty Images)