Repetition
U.S. Air Force Col. Mark Barrera, 23d Wing vice commander, utilizes switches during training in an A-10C Thunderbolt II Full Mission Trainer Sept. 3, 2015, at Moody Air Force Base, Ga. The FMT simulator is cost effective and saves pennies on the dollar compared to the thousands of dollars used during actual flight in the A-10 aircraft. (U.S. Air Force photo by Airman 1st Class Greg Nash/Released)