Senior Airman Jonathan Cummins, 700th Airlift Squadron flight engineer, checks his oxygen levels on a C-130 Hercules before RED-FLAG-Alaska 19-2 near Joint Base Elmendorf-Richardson, Alaska, June 19, 2019. RED-FLAG-Alaska is an annual U.S. Pacific Air Forces field training exercise for U.S. and allied partners to practice combat readiness in a controlled environment. (U.S. Air Force photo by Staff Sgt. Matthew Lotz)

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Photo by: Staff Sgt. Matthew Lotz |  VIRIN: 190614-F-AI558-9325.JPG