"With every step, the Tomb Guards pay homage to America's fallen. Keeping vigil at the Tomb of the Unknown Soldier, in Arlington National Cemetery, are the sentinel guards, whose every step, every turn, honors and remembers America's fallen. They protect fellow soldiers who have paid the ultimate sacrifice, making sure they are never alone. To stand there--with absolute precision, in every type of weather, at every moment of the day, one in a line...