Rifle inspection at the Tomb. Before the changing of each guard, the incoming Tomb Guards, also known as Sentinels, are inspected by the Relief Commander at Arlington National Cemetery. This is a high-speed look at that detailed, white-glove inspection of the Sentinel’s rifle and uniform. In reality, the inspection itself is about 2 minutes long. Serving as a Tomb Guard is an honor and has a very strict selection process. Interested in joining the U.S. Army? Visit: https://www.goarmy.com/?iom=BN