It's also a known fact that the US government gave Osama Bin Laden training via the CIA back in the day. George Bush senior was great friends with Osama's family (probably because they're rich/Republicans love Middle Eastern Oil?).
I won't bother going into the conspiracy theories about 9/11, and how Osama "eluded capture" FROM JUST ABOUT EVERY GOVERNMENT IN THE WORLD THAT WANTED HIM "DEAD" for the past 10 years, BUT the statement above re: where a lot of his terrorist knowledge came from is 100% true (even look it up)