Esper Greeting Defense Secretary Dr. Mark T. Esper meets with sailors during a tour of the USS South Dakota in Groton, Conn., Aug., 27, 2019. SHARE IMAGE: Download Image: Full Size (0.33 MB) Tags: Navy, Defense Secretary, Esper Photo By: Army Staff Sgt. Brandy Nicole Mejia VIRIN: 190827-D-AP390-1578.JPG Photo Gallery