U.S. Air Force Col. William Marshall, 48th Fighter Wing commander, conducts pre-flight checks prior to his final flight at Royal Air Force Mildenhall, England, July 7, 2020. Marshall will relinquish command on July 10, as he transitions to become the 3rd Air Force vice commander at Ramstein Air Base, Germany. (U.S. Air Force photo by Senior Airman Christopher S. Sparks)