According to a 15 May 2009 blog posting by '' Newsweek 's '' Eleanor Clift , Vice President Joe Biden revealed the existence of what Clift described as a bunker-like room in the residence . The bunker is the secure , undisclosed location where former Vice President Dick Cheney remained under protection in secret after the September 11 attacks : according to Clift 's report , titled " Shining Light on Cheney 's Hideaway " : Biden said a young naval officer giving him a tour of the residence showed him the hideaway , which is behind a massive steel door secured by an elaborate lock with a narrow connecting hallway lined with shelves filled with communications equipment . Biden 's press office subsequently issued a statement denying the bunker report , suggesting that Biden had instead been describing " an upstairs workspace "
September 11 attacks
September 11 attacks
United States Naval Observatory