U.S. Airmen, training with the 68th Rescue Squadron, monitor their teammate’s oxygen level as he conducts rescue operations in a simulated low-oxygen environment during a Combat Leader Course training exercise at the Titan Missile Museum in Green Valley, Ariz., Aug. 21, 2023. The simulated low-oxygen environment required the student who descended to the lowest level to breathe from an oxygen tank which effectively simulated a possible real-world scenario. (U.S. Air Force photo by Airman 1st Class Devlin Bishop)
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