Shortly after World War I, a white marble sarcophagus was erected in Arlington Cemetery where an unknown American soldier was laid to rest, representing all who not only gave their lives, but also their identities, for their nation. From WWI through the disinterment of the Vietnam Unknown Soldier in 1998, join us as we explore the history of this hallowed site with Gavin McIlvenna, President of the Society of the Honor Guard, Tomb of the Unknown Soldier.