Esper Testimony Defense Secretary Dr. Mark T. Esper makes a point during a House Armed Services Committee hearing on Syria and Middle East policy, Dec. 11, 2019. Army Gen. Mark A. Milley, the chairman of the Joint Chiefs of Staff, right, also testified at the hearing. SHARE: Download: Full Size (2.93 MB) Tags: Esper Credit: Army Sgt. 1st Class Chuck Burden VIRIN: 191211-D-HD608-0004.JPG Photo Gallery