U.S. President Herbert Hoover and First Lady Lou Henry Hoover visits Unknown Soldier's tomb in Arlington, Virginia. Troops lined beside the tomb of Unknown Soldier, on Armistice Day. U.S. President Herbert Hoover arrives with his wife Lou Henry Hoover, with other officials. President Hoover offers flowers at the Unknown Soldier's tomb and stands aside. The officers salute. First Lady Lou Henry Hoover places flowers at the tomb. An officer plays the bugle in front of the tomb. Troops lined on both sides. The President and the First Lady walks away with the officials.