U.S. and Italian Air Forces aircraft consisting of F-35 Lightning IIs, F-16 Fighting Falcons and a B-52 Stratofortress, fly in formation over the Adriatic Sea during exercise Astral Knight 19, June 4, 2019. Astral Knight is an exercise taking place throughout various locations in Europe, involving more than 900 Airmen and supports the collective defense and security of NATO allies and U.S. forces in Europe. (U.S. Air Force photo by Staff Sgt. Joshua R. M. Dewberry)