mattis Defense Secretary Jim Mattis and Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, speak with Rhode Island Senator Jack Reed at the Senate Appropriations Defense Subcommittee hearing on Capitol Hill, March 22, 2017. DoD photo by Navy Petty Officer 2nd Class Dominique A. Pineiro SHARE IMAGE: Download Image: Full Size (3.11 MB) Tags: senate, joint staff, isil, General Dunford, Joseph F. Dunford, 19th CJCS, Joseph F. Dunford Jr. , sac-d, sac, Iraq, SecDef, Chairman, Joe Dunford, Syria, usmc, MARINE CORPS, MARINES Photo By: Dominique A. Pineiro VIRIN: 170322-D-PB383-003.JPG Photo Gallery