What is the Truth behind 9/11 ?

know we will never know. but there are stories. G. bush said it was bin laden but my friend said in a doentary, he was having surgery on his knee. and don't you find it strange that when the planes when in nothing came out the other side. and also some say the planes were hijacked, my friend said they weren't. the americans did it. also my friend said that G.bush did it because there was money underneath the towers and i saw in a video in youtube, that there were bombs planted in the tower. was it all a plot. who knows. what do you think happened? there are so many stories. also anyone know where tania head is? the 9/11 faker?