Three U.S. Air Force F-15s, assigned to the 48th Fighter Squadron at RAF Lakenheath, England, fly in formation behind a U.S. Air Force KC-135 Stratotanker off the Southern coast of England, June 6, 2019. The F-15s were painted with heritage markings in honor of the 75th anniversary of D-Day. As we commemorate D-Day 75, U.S. forces in Europe remain committed to collective defense and cooperative security alongside European allies and partners. (U.S. Air Force photo by Senior Airman Benjamin Cooper)