“I started thinking about the Tomb of the Unknown Soldier, which was also visible in the distance. Click, click, click, twenty-one times, stop; turn around; pause twenty-one seconds; repeat. Click, click, click, twenty-one times, stop; turn around; pause twenty-one seconds; repeat. The heels of the guard on duty at the Tomb of the Unknown Soldier click on the pavement twenty-four hours straight, seven days a week, 365 days a year, year in and year out. Rain, sleet, or snow never interrupts this routine. The only time it is interrupted is during the changing of the guard, which happens every thirty minutes. The whole routine then resumes until the next relief. There is much more behind the symbolism, sacrifices, and commitments of these dedicated warriors, but that’s a whole other story in itself.”
―
Paul Landis,
The Final Witness: A Kennedy Secret Service Agent Breaks His Silence After Sixty Years