First theory- Neo-cons A neo-con is someone who believes in limited government, like a republican. Some people believe that the republicans did 9-11 and blamed it on Afghanistan and Iraq so we could have an excuse to attack Afghanistan and Iraq and become the sole power of the world.
Jets were told to stand down-The jets were told to stand down and not go after the attacking planes on the twin towers, so this means that for this to happen the entire flight crew the control tower and anyone involved had to be in on the conspiracy theory and has kept silent about it sense...
Some people believe that flight 11 and 175 weren't actually the planes that crashed into World Trade Center 1 & 2 because the planes that crashed left depressions of the engines and they didn't match the engines on the flights that went missing that day. The planes that crashed into the buildings were thought to be military fighter jets because they were gray with no logos and no windows, with two twin engines.