A Tomb Sentinel pauses for 21 seconds before passing in front of the Tomb of the Unknowns in Arlington National Cemetery, VA., during Hurricane Irene on Aug. 27, 2011. The category 1 hurricane hit the cemetery with wind gusts of up to 60 miles per h...

A lone Tomb Sentinel, 3d U.S. Infantry Regiment (The Old Guard), walks his tour in humble reverence during Hurricane Irene in Arlington National Cemetery, Va., Aug 27. Members of The Old Guard have guarded the Tomb every second, of every day regardle...

A lone Tomb Sentinel stands vigilant guard over the Tomb of the Unknowns in Arlington National Cemetery Va., during Hurricane Irene on Aug. 27, 2011. The Tomb of the Unknowns has been guarded around the clock since July 2, 1937. (U.S. Army photo by ...