In this photo released by the Nigeria State House, Gambia President, Yahya Jammeh, left, speaks with Nigeria President Muhammadu Buhari, upon arrival in Banjul Gambia, Friday Jan.13, 2017. Nigeria's president was leading a regional delegation to ...

FILE -- In this Dec. 9, 2016 file photo, Afghan President Ashraf Ghani, right, and U.S. Defense Secretary Ash Carter, left, wave after a press conference at presidential palace in Kabul, Afghanistan. A U.S. report released Wednesday, Jan. 11, 2017 ...