To observe the 100th anniversary of the Tomb of the Unknown Soldier, former sentinels are joined by the Ceremonial Unit of the U.S. Capitol Police for a flag folding observance, at the Capitol in Washington, Wednesday, Nov. 10, 2021. The special flag was flown over several American military cemeteries at World War 1 battle sites in France. (AP Photo/J. Scott Applewhite)