Esper Webinar Defense Media Activity personnel, along with chief Pentagon spokesman Jonathan Rath Hoffman, prepare Defense Secretary Dr. Mark T. Esper for a Brookings Institution webinar, May 4, 2020. SHARE IMAGE: Download Image: Full Size (2.55 MB) Tags: Esper, Coronavirus Photo By: Marvin Lynchard, DOD VIRIN: 200504-D-FW736-1012.JPG Photo Gallery