When in the 60's the skyscrapers became virtually indestructible steel frame buildings, that needed a shit load of conventional explosives to destroy, they insisted that you had to have a demolitio.
(Large underground nuke test video) (Suit case nuke info) Conspiracy Theory Playlist:
Famous video by Etienne Sauret. It clearly shows a strong earthquake (well over 5.5 on the Richter Scale - telling us than not less than 100 kiloton underground nuclear explosion must have.
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