Senior Airman Steven Hill, 507th Security Forces Squadron, and a team of 507th SFS defenders set up a perimeter to secure aircraft on the flightline during an aircraft generation exercise geared toward wartime preparation and readiness March 2, 2019, at Tinker Air Force Base, Oklahoma. The 507th Air Refueling Wing's unit effectiveness inspection capstone event is scheduled for Nov. 15-19, 2019. (U.S. Air Force photo by Tech. Sgt. Lauren Gleason) (This photo has been altered for security purposes by blurring out identification badges.)