Swearing In Army Gen. Mark A. Milley, chairman of the Joint Chiefs of Staff, swears in Air Force Gen. John E. Hyten as vice chairman of the Joint Chiefs of Staff at the Pentagon, Nov. 21, 2019. SHARE IMAGE: Download Image: Full Size (1.38 MB) Tags: hyten, chairman, vice chairman, milley Photo By: DOD VIRIN: 191121-D-SW162-1107.JPG Photo Gallery