U.S. Defense Secretary Ash Carter, center, participates in a panel discussion on security issues during the World Economic Forum annual meeting in Davos, Switzerland, Jan. 22, 2016. Also participating were, from left, Afghan President Ashraf Ghani, NATO Secretary General Jens Stoltenberg and Singapore Deputy Prime Minister Tharman Shanmugaratnam. DoD photo by Army Sgt. 1st Class Clydell Kinchen