Two U.S. Air Force B-52H Stratofortress’s, four U.S. Air Force F-16 Fighting Falcons, and one U.S. Air Force E-3 Sentry fly in a formation over Poland during exercise Astral Knight 20, Sept. 25, 2020. Astral Knight is a multinational exercise that provides training with our joint and combined allies and partners to increase our lethality and enhances interoperability.