Members of the Air Force Special Tactics Training Squadron at Hurlburt Field, Fla., rehearse their free-fall procedures before a high-altitude, low-opening jump. Special Tactics Airmen perform many tasks during a mission that place unique stresses on the human body.

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Size: 4454px × 2965px
Photo credit: © LOU Collection / Alamy / Afripics
License: Licensed
Model Released: No

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