Rayburn Arrival Defense Secretary Jim Mattis and Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, arrive at the Rayburn House Office Building to provide testimony on the FY2018 Defense Budget Request before the House Armed Services Committee in Washington D.C., June 12, 2017. DoD photo by Navy Petty Officer 2nd Class Dominique A. Pineiro SHARE: Download: Full Size (2.3 MB) Credit: Dominique A. Pineiro VIRIN: 170612-D-PB383-012A.JPG Photo Gallery