Capt. Steven Wilhoit goes through a preflight checklist before a training flight Aug. 13, 2013, at Nellis Air Force Base, Nev. Aggressor pilots are trained in the use of adversary tactics to better prepare U.S. and allied pilots for possible air-to-air conflict. Wilhoit is an F-16 Fighting Falcon pilot assigned to the 64th Aggressor Squadron. (U.S. Air Force photo/Airman 1st Class Joshua Kleinholz)

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Photo by: Airman 1st Class Joshua Kleinholz |  VIRIN: 130813-F-MF020-138.JPG