Pentagon Briefing Defense Secretary James N. Mattis and Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, brief reporters on the current U.S. airstrikes on Syria during a joint news conference at the Pentagon, April 13, 2018. DoD photo by Army Sgt. Amber I. Smith SHARE IMAGE: Download Image: Full Size (1.53 MB) Tags: James N. Mattis, SecDef, Chairman, Joint Chiefs, Joe Dunford, Marine Corps, Syria Special Photo By: Amber I. Smith VIRIN: 180413-D-SV709-0215Y.JPG Photo Gallery