U.S. Military Honor Guard members hold onto their covers as a helicopter arrives at Camp David, MD., transporting Secretary of Defense Ash Carter, Afghan Chief Executive Abdullah Abdullah, Secretary of State John Kerry, Secretary of the Treasury Jacob L. Lew, and Afghan President Ashraf Ghani (none pictured) to Camp David to discuss matters of mutual importance Mar. 23, 2015. (Photo by Master Sgt, Adrian Cadiz)(Released)