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: Download: Full Size (0.66 MB) Tags: Defense Secretary, Esper Credit: David Vergun, DOD VIRIN: 200124-D-UB488-001.JPG Photo Gallery