Esper Greeting Defense Secretary Dr. Mark T. Esper shakes hands with Italian Defense Minister Lorenzo Guerini at the Pentagon, Jan. 31, 2020. SHARE: Download: Full Size (0.84 MB) Tags: Defense Secretary, partnerships, Esper Credit: Navy Petty Officer 2nd Class James K. Lee VIRIN: 200131-D-WA993-2167A.JPG Photo Gallery