What underground nuclear bunker near Blue Ridge Summit, Pennsylvania known as "underground Pentagon" became operational in 1966?
Raven Rock Mountain Complex The Raven Rock Mountain Complex (RRMC) is an American military installation with an underground nuclear bunker near Blue Ridge Summit, Pennsylvania, at Raven Rock Mountain that has been called an "underground Pentagon." The bunker has emergency operations centers for the United States Army, Navy, and Air Force. Along with Mount Weather Emergency Operations Center in Virginia and the Cheyenne Mountain Complex in Colorado, it formed the core bunker complexes for the US Continuity of Government plan during the Cold War to survive a nuclear attack.
Snake Hill Snake Hill (known officially as Laurel Hill) is an igneous rock intrusion jutting up from the floor of the Meadowlands in southern Secaucus, New Jersey, USA, at a bend in the Hackensack River. It was largely obliterated in the 1960s by quarrying that reduced the height of some sections by one-quarter and the area of its base by four fifths. The diabase rock was used as building material in growing areas like Jersey City. The remnant of the hill is the defining feature of Laurel Hill County Park. The high point, a 203-foot (62 m) graffiti-covered inselberg rock formation, is a familiar landmark to travelers on the New Jersey Turnpike's Eastern Spur, which skirts the hill's southern edge. The crest of the hill's unusual, sloping ridge is about 150 feet (46 m) high.