Giggit, you're an idiot.
If a briefcase nuke went off in the basement, it wouldn't have been a few people in the basement who heard it go off (they'd have been killed in the blast and immediate collapse that followed), it would've been people several blocks away who heard it. The collapse would have started at the bottom of the building (the area where the explosion removed support), not at the impact site where the plane hit it. The building would have been even more likely to topple sideways instead of down, and it would NOT have stood for as long as it did after a briefcase nuke went off.
You're contradicting your own evidence that you've continually spouted in this thread...something you seem to do everytime another of your tedious and uninformed theories is shot down in a flaming pile of doggie poo.
If you really care about this, if you really believe this is important, prove it. Right now the only thing you're doing is convincing everyone who reads your mad rantings that the official version of events is true. If you really care, tkae the time and effort to learn what you're talking about. Study physics, study chemistry, study study architecture and engineering, study structural materials and materials science. Look for all the evidence, and compare it against actual science. Don't just pick and choose from conspiracy sites who's sum total of experise consist of the College of "What I can't understand is...", the School of "This guy told me...", the University of "But if...", and the Kindergarten of "If I can't hear you you don't exist!"