150323-D-DT527-066 WASHINGTON (March 23, 2015) Secretary of of State John Kerry walks with Afghan President Ashraf Ghani as they arrive at Camp David, Md., to discuss matters of mutual importance with Secretary of Defense Ash Carter, Secretary of the Treasury Jacob L. Lew, and and Afghan Chief Executive Abdullah Abdullah. (U.S. Air Force photo by Master Sgt, Adrian Cadiz/Released)