I forgot to include the Pentagon, Lweji.
Yep, cozie, it was all a conspiracy to get us into a war in the Middle East. It was either Big Business did it for oil, the Jews did it so we'd kill Muslims for them, or the US Govt did it to have an excuse for GW Bush to 'finish off' Saddam Hussein as his father failed to do so during the 1st Gulf War. Friend's reasons seem to change depending on what website or alt-right talking head he's listened to last. There are vast websites dedicated to it. Complete with pictures and slo-mo videos 'proving' there were 'charges' set off in the WTC so it would collapse, a 'bomb' was detonated at the Pentagon. It's bizarre and insulting to the innocent people and first responders who lost their lives.
I'm surprised Trump hasn't come out with these theories and said "it was the Democrats what done it" like the ignoramus he is.