U.S. Air Force Airman 1st Class Daniel Lasal, 480th Aircraft Maintenance Unit crew chief from Spangdalhem, Air Force Base, Germany, performs preflight checks on an F-16 Fighting Falcon during Red Flag 13-2 Jan. 22, 2013, at Nellis Air Force Base, Nev. Lasal watches the engine and talks to the pilot as he puts the engine though its preflight inspection. (U.S. Air Force Photo by Senior Airman Daniel Hughes)