Pentagon Handshake Defense Secretary Dr. Mark T. Esper hosts a bilateral meeting with United Kingdom Defense Secretary Ben Wallace at the Pentagon, March 5, 2020. SHARE IMAGE: Download Image: Full Size (0.89 MB) Tags: Defense Secretary , Partnerships, Esper Photo By: Marvin Lynchard, DOD VIRIN: 200305-D-FW736-1014C.JPG Photo Gallery