Professional bad guys: Space aggressors prepare Airmen for the enemy
From right, Senior Master Sgt. Thomas Arns, 527 Space Aggressor Squadron, cracks a smile while undergoing proficiency training given by Capt. Brian Goodman July 20, 2016 at Nellis Air Force Base, Nevada during exercise Red Flag. Red Flag 16-3 is aimed at teaching service members how to integrate air, space and cyberspace elements. (U.S. Air Force photo/Tech. Sgt. David Salanitri)

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Photo by: Tech. Sgt. David Salanitri |  VIRIN: 160720-F-TM170-017.JPG