U.S. Secretary of Defense Dr. Mark T. Esper bids a socially distanced farewell to Col. Jeffrey Schreiner, 509th Bomb Wing commander, at Whiteman Air Force Base, Missouri, July 22, 2020. Esper visited Whiteman AFB to engage with Airmen and senior leaders and get a firsthand understanding of the operations supporting the B-2 Spirit stealth bomber. Schreiner is responsible for the combat readiness of the Air Force's only B-2 base, including the development and employment of the B-2's combat capability as part of Air Force Global Strike Command. (U.S. Air Force photo by Senior Airman Thomas Barley)