USS Gravely Defense Secretary Dr. Mark T. Esper talks with a crew member during his visit to the destroyer USS Gravely, at Norfolk, Va., Sept. 25, 2019. SHARE IMAGE: Download Image: Full Size (2.88 MB) Tags: Defense Secretary , SecDef, Esper Photo By: Lisa Ferdinando, DOD VIRIN: 190925-D-BN624-0877.JPG Photo Gallery