it could be like this: there were really some 20 fanatics who have such a plan to destroy WTC etc. USA intelligence knew about them and they were ALLOWED to do this...
for me it's the same as conspiracy...
later, when you see that people like Donald Rumsfeld or Dick Cheney opted that much for the wars, and they made A LOT from that wars (IRAQ), doesn't it make you think ?
Haliburton etc...........
it is so obvious that it may be *unbelievable* for its easy "obviouslity" - [whatever the word is
]