Via the First Army Division East's Facebook page:

Soldiers of the 3rd Inf Reg. continue to stand guard at the Tomb of the Unknown Soldier, despite the worsening weather conditions surrounding Hurricane Sandy. The tomb has been guarded continuously since 1948.

Update: Commenter @saladdin pointed out that this was not from today. After some researching, it appears that is correct. (Currently slapping myself for being gullible.)