> I don't think you were referring to these, but there are actually a few windowless, fortified concrete skyscrapers in New York that were built as telephone sw

> I don't think you were referring to these, but there are actually a few windowless, fortified concrete skyscrapers in New York that were built as telephone switching centers. Actually no. The ones I'm referring to were (usually) built way out in rural areas, where they were away from the expected blast area of a hit on a major city. The one I'm aware of is built mostly underground, then backfilled so that it looks like a natural hill (a hill with a concrete top, and a big microwave tower). Some of these facilities were rumored to have ground entry points for a system called Combat Ciders ... http://www.fas.org/nuke/guide/usa/c3i/combat_ciders.htm http://www.fas.org/nuke/guide/usa/c3i/combat_ciders.htm