Security Speech Defense Secretary Dr. Mark T. Esper provides the keynote address on “Maintaining the U.S. National Security Innovation Base” at the Center for Strategic and International Studies’ Global Security Forum in Washington, Jan. 24, 2020. SHARE IMAGE: Download Image: Full Size (0.66 MB) Tags: Defense Secretary , Esper Photo By: David Vergun, DOD VIRIN: 200124-D-UB488-001.JPG Photo Gallery