Tomb Sentinel A tomb sentinel assigned to the 3rd U.S. Infantry Regiment, known as the ‘Old Guard,’ stands watch at the Tomb of the Unknown Soldier in Arlington National Cemetery, Arlington, Va., Aug. 9, 2023. SHARE IMAGE: Download Image: Full Size (0.66 MB) Tags: army Photo By: Henry Villarama, Army VIRIN: 230809-A-AR102-1070.JPG Photo Gallery