A Patriot missile battery sits on an overlook at a Turkish army base in Gaziantep, Turkey, Feb. 4, 2013. U.S. Deputy Secretary of Defense Ashton B. Carter was visiting the area to view Patriot missile batteries installed with assistance from U.S. Service members. U.S. and NATO Patriot missile batteries and personnel deployed to Turkey in support of NATO's commitment to defending Turkey's security during a period of regional instability.