Mattis Testimony Defense Secretary Jim Mattis testifies on the Defense Department's fiscal year 2017 budget proposal before the Senate Appropriations Committee's defense subcommittee in Washington, D.C., March 22, 2017. DoD photo by Navy Petty Officer 2nd Class Dominique A. Pineiro SHARE: Download: Full Size (0.89 MB) Credit: Navy Petty Officer 2nd Class Dominique A. Pineiro VIRIN: 170322-D-PB383-022C.JPG Photo Gallery