Senior Airman Chase Gilmour, 421st Aircraft Maintenance Unit crew chief, prepares an F-35A Lightning II fighter jet for refueling during Astral Knight 2019 on June 5, 2019, at Aviano Air Base, Italy. The F-35s are participating in Astral Knight 2019, a multinational exercise that enhances relationships with allies and improves overall coordination with partner militaries during times of crisis. (U.S. Air Force photo by Tech. Sgt. Jim Araos)