190603-F-QO224-1019
U.S. Air Force Airman 1st Class Alex Bengel, 351st Air Refueling Squadron boom operator, performs aerial refueling checklist during exercise Astral Knight over the skies of Italy, June 3, 2019. AK19 is a joint, multinational exercise designed to test Integrated Air and Missile Defense capabilities and will involve a combination of flight operations and computer-assisted exercise scenarios. Participants include the U.S. Air Forces in Europe, U.S. Army Europe forces, and members from the Italian and Croatian air forces. (U.S. Air Force photo by Airman 1st Class Brandon Esau)