Of course, there's laser-based eavesdropping from the outside of the building, and I'd bet this was actually the method used in many cases. Laser/vibration-proof glass apparently does exist (it's installed in that DARPA building in downtown watchamaface VA), but I doubt it's installed in the UN, as it's VERY expensive. (But then again, maybe some select rooms have it.)
That is why most secure meetings occur in interior rooms.
steve
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