Old Guard continues watch over Tomb of the Unknown at Arlington National Cemetery

ARLINGTON, Va. -- Army Guards stood watch at the Tomb of the Unknown at Arlington National Cemetery in Washington D.C. despite Hurricane Sandy.

The Army's Third U.S. Infantry Regiment, known as the Old Guard, is responsible for guarding the tomb, which was built after World War I to honor the memory of unidentified soldiers killed in the war.

Though the cemetery has been closed to tourists because of Sandy, the Old Guard continues their watch, albeit without the choreographed 21-pace march the public usually sees.

Instead, soldiers in combat uniforms guard the tomb from a small enclosure covered by a green awning known as "the box," which is about 20 feet away.

If the weather becomes intolerable, the tomb can be guarded from a room inside a nearby amphitheater.

The tomb has been guarded by members of the Third Infantry Honor Guard since 1948.