Was the destruction of the twin towers scientifically possible on 9/11

I will soon be publishing my book in which I prove that the planes flying into the WTC buildings were just a distraction. The actual destruction of the buildings was caused by explosive charges placed at strategic points that were triggered by a third party hiding behind the grassy knoll across from the WTC. This terrorist organization has perpetrated previous crimes against the US. Their one defining characteristic is the grassy knoll that they carry with them wherever they go to do their nefarious deeds.