Sentinel Greeting World War II veteran Jack Eaton, 100, is greeted by soldiers at Arlington National Cemetery, Va., Oct. 23, 2019. Eaton, a former Army corporal, served as a sentinel at the Tomb of the Unknown Soldier from 1938-1940. SHARE IMAGE: Download Image: Full Size (4.18 MB) Tags: Army, World War II, veterans, Tomb of the Unknown Soldier Photo By: Elizabeth Fraser, Army VIRIN: 191023-A-IW468-174.JPG Photo Gallery