If 9/11 wasnt an inside job, please explain this?

When the news media reported on the WTC they reported on the towers falling minutes before it actually fell. Also, there was smoke coming out of the towers before the planes even hit! Also, if 9/11 wasnt an inside job, why was Osama Bin Laden allowed to leave the day after 9/11? Also, why did Bush blame Osama and then turn around and blame Saddam?