The Arlington National Cemetary was a sight to see. We took the tour and it was a very well spent $7.50. Both of us were impressed with the changing of the guard. Those selected individuals train for a year before taking on the responsibilities of guarding the Tomb on the Unknown soldiers. 21 steps, 21 seconds and 21 more steps. over and over and over again. God love them because I would go nuts with the solemness and repetitiveness.