I personally witnessed this ceremony at Arlington National Cemetery in Washington, D.C. many years ago. In this video, you will see a personal inspection of the soldier assuming guard duties, including his rifle, his uniform, and his deportment. All must be perfect before he can step forward to guard the Tomb. The guard detail has been on duty 24/7 since the first unknown was buried here following WWI. The guards walk exactly 21 steps (like the 21-gun salute) each way. The rifle is always on the opposite shoulder from the Tomb. Even in rain, sleet, high winds, or snow, the guards have never failed to "walk the walk" since the beginning. This is how our active duty soldiers honor their unknown fallen forebears in fullest measure.
YouTube - Changing of the Guard - Tomb of the Unknown Soldier
With respect to all those who gave their lives - even if their names are not known:
YouTube - Changing of the Guard - Tomb of the Unknown Soldier
With respect to all those who gave their lives - even if their names are not known:
