Breathing required: Faster, Stronger, Cheaper

Oxygen tanks are displayed behind a reduced oxygen breathing device July 28, 2014, at Spangdahlem Air Base, Germany. The ROBD mixes oxygen and nitrogen to simulate an unpressurised cockpit of an aircraft so the pilots can feel some of the symptoms of hypoxia and learn to operate despite them. (U.S. Air Force photo by Senior Airman Rusty Frank/Released)

PHOTO BY: Senior Airman Rusty FrankReleased
VIRIN: 140728-F-YU668-080.JPG
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