Joint Terminal Attack Controller Tech. Sgt. Aaron Switzer, U.S. Air Force, uses a radio to communicate with pilots of A-10 Thunderbolt II aircraft during a close air support training mission at the Nevada Test and Training Range on Sept. 23, 2011. Joint terminal attack controllers perform proficiency training with U.S. Air Force Weapons School students during the close air support phases of the Weapons School. Switzer is attached to the 21st Special Tactics Squadron, Pope Field, N.C.