Pentagon Media Brief Chief Pentagon spokesperson Dana W. White and Marine Corps Lt. Gen. Kenneth F. McKenzie Jr., the director of the Joint Staff, brief Pentagon reporters at the Pentagon, Oct. 5, 2017. DoD photo by Air Force Tech. Sgt. Brigitte N. Brantley SHARE IMAGE: Download Image: Full Size (1 MB) Tags: brigitte brantley, Secretary of Defense , james mattis, JIm Mattis, Chaos, Department of Defense, Photo, DoD, Defense Secretary , SecDef, Pentagon, MILITARY Photo By: Brigitte N. Brantley VIRIN: 171005-D-FN314-001.JPG Photo Gallery