NELLIS AIR FORCE BASE, NV, UNITED STATES

U.S. Air Force pararescueman gives a ready sign to the shore before beginning his mission during a diving training course, June 20, 2012, at Lake Meade, Nev. To become a pararesuceman means out-lasting nearly 90 percent of your starting class, which is the highest dropout rate of any U.S. Special Operations school.

Courtesy of DVIDS