Aircraft electrical and environmental system technicians with the 509th and 131st Aircraft Maintenance Squadrons set up a cabin pressure tester cart at Whiteman Air Force Base, Mo., July 27, 2017. Cabin pressurization creates a safe and comfortable environment for the pilots when they fly missions at altitudes as high as 50,000 feet. ( Air Force photo/Staff Sgt. Danielle Quilla)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: -2, 509th, air, aircraft, altitudes, amxs, electrical, environmental, fly, maintenance, mission, pressurization, propulsion, spirit, squadron, system