There has been talk of Osma and Saddam working togather (especially to supply weapons to Osma), sine the first World Trade Center Bombing when Clinton was president. Rather they had been truely working togather to try and bring down the US, is unsure. But there has alwasy been speculation about it.
http://www.worldthreats.com/middle_east/iraq_terror.htm
Why Clinton didn't snuff out Osma back when the World Trade Center was first bombed, I have no idea. It would of helped prevent 9/11. At least Osma would of been on the run. Instead we had to wait for Bush, before any action was taken.