The Tomb of the Unknown Soldier in Arlington National Cemetery, overlooking Washington D.C. "Here rests in honored glory an American soldier known but to God." 24 hours-a-day, 7 days-a-week, 365 days-a-year, a soldier is guarding this tomb. Over and over again, he: Marches 21 steps south down the black mat laid across the Tomb Turns and faces east, toward the Tomb, for