Milley Remarks Army Gen. Mark A. Milley, chairman of the Joint Chiefs of Staff, speaks to reporters during a briefing with Defense Secretary Dr. Mark T. Esper at the Pentagon, Dec. 20, 2019. SHARE: Download: Full Size (2.77 MB) Tags: Milley, Chairman Credit: Marine Corps Sgt Warren Smith, DOD VIRIN: 191220-D-MG926-012.JPG Photo Gallery