Hold your breath (original) (raw)

A combat control instructor gives commands to trainees during an early morning water circuit training session Feb. 12, 2015, at Pope Army Airfield, N.C. Combat controllers are among the most highly trained personnel in the U.S. military. The instructor is assigned to the 342nd Training Squadron, Operating Location-C. (U.S. Air Force photo by Staff Sgt. Kenny Holston/Released)