Tech. Sgt. Stephenie Tatum, 137th Aeromedical Evacuation Squadron medical technician, tests her oxygen mask during a simulated rapid decompression on a C-130 Hercules flown by the 130th Airlift Wing, West Virginia ANG, as part of a joint ANG training mission, Sept. 12, 2015. The training helped 137 AES Airmen experience different airframes and new flight crews while maintaining flight readiness. (U.S. Air National Guard photo by Senior Airman Tyler Woodward/Released)

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