Greeting Airmen Defense Secretary Dr. Mark T. Esper shakes hands with airmen during his visit to the headquarters of U.S. Strategic Command at Offutt Air Force Base, Neb., Feb. 20, 2020. SHARE IMAGE: Download Image: Full Size (2.48 MB) Tags: Defense Secretary, Strategic Command, Esper Photo By: Army Staff Sgt. Brandy Nicole Mejia VIRIN: 200220-D-AP390-1340A.JPG Photo Gallery