Airman 1st Class Benjamin Blake, 351st Air Refueling Squadron boom operator, checks his oxygen mask prior to takeoff during a readiness exercise at RAF Mildenhall, England, Oct. 3, 2019. Exercise scenarios were designed to ensure 100th Air Refueling Wing Airmen were fully prepared for potential contingencies in the wing’s area of responsibility. (U.S. Air Force photo by Airman 1st Class Brandon Esau)