http://www.youtube.com/watch?v=reQZT...eature=related
There's also a theory that a "space beam" invented during Reagan's "Star Wars" program, was used to "vaporize" 80% of the steel in the WTC buildings.
And, a funnier theory, is that the government invented the "no planes" and "space beam" theories, in order to make the REAL "truth movement" look silly. You'll see truthers call each other "Disinfo agents" a lot.