Trump, Mattis, Dunford Honor Fallen Service Members on Memorial Day President Donald J. Trump, right, Defense Secretary Jim Mattis and Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, render honors during the 149th annual DoD National Memorial Day Observance at Arlington National Cemetery in Virginia, May 29, 2017. DoD Photo by Army Sgt. James K. McCann SHARE: Download: Full Size (0.51 MB) Tags: Chairman, Memorial Day, SecDef, president, Donald J. Trump, JIM MATTIS, Joe Dunford Credit: Army Sgt. James K. McCann VIRIN: 170529-D-SW162-1387.JPG Photo Gallery