Wreath Laying Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, left, and Army Command Sgt. Maj. John W. Troxell, senior enlisted advisor to the Chairman of the Joint Chiefs of Staff, second from left, salute during a wreath-laying ceremony alongside their Canadian counterparts at the Tomb of the Unknown Soldier at the National War Memorial during a visit to Ottawa, Canada, Feb. 28, 2018. DoD photo by Army Sgt. James K. McCann SHARE: Download: Full Size (0.75 MB) Credit: Sgt. James K. McCann VIRIN: 180228-D-SW162-1071A.JPG Photo Gallery