An uninterrupted watch at the Tomb of the Unknown Soldier

Army soldiers from the 3rd U.S. Infantry Regiment, known as “The Old Guard,” have kept watch over the Tomb of the Unknown Soldier around the clock for more than 70 years. Even though Arlington National Cemetery, where the tomb is located, has been closed to visitors during the COVID-19 pandemic, this poignant ritual still endures. Judy Woodruff reports.