Tomb of the Unknown Soldier guards at Arlington walk 21 steps and pause 21 seconds, unbroken since 1937
Tomb of the Unknown Soldier guards at Arlington march 21 steps and pause 21 seconds, a 24-hour watch kept without a break since July 2, 1937.
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Tomb of the Unknown Soldier guards at Arlington march 21 steps and pause 21 seconds, a 24-hour watch kept without a break since July 2, 1937.
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