Man Stumbles Upon America’s Biggest SecretBy Tammy Salt / November 21, 2018 2. Keeping America Safe almanac.com Reports are showing that the hidden bunker of Raven Rock has been modernized after the 9/11 attacks and that it has been running 24/7 ever since. Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20