U.S. Air Force pilots perform a pre-flight D-Day anniversary flyover briefing at Ramstein Air Base, Germany, June 6, 2021. The 1944 invasion, officially called "Operation Overlord," combined the forces of 156,115 U.S., British and Canadian troops; 6,939 ships and landing vessels; and 2,395 aircraft and 867 gliders that delivered Airborne troops. (U.S. Air Force photo by Airman Edgar Grimaldo)