Airman 1st Class Oscar Mares, 492nd Aircraft Maintenance Unit crew chief, waits for the aircrew to start the engine of an F-15E Strike Eagle at Los Llanos Air Base, Spain, Jan. 29, 2015. The 492nd Fighter Squadron was in Spain to participate in the 2015 Tactical Leadership Programme, which was cut short due to an aircraft crash on Jan. 26, 2015. (U.S. Air Force photo by Airman 1st Class Erin R. Babis/Released)