Did the Bush Administration willingly assist Al Qaeda, post 9/11, in accomplishing its main goal (Details)?

1. ‘Over the years, bin Laden and his fellow terrorists launched numerous strikes against U.S. targets with the stated design of getting American forces out of Saudi Arabia — including the twin embassy bombings in East Africa; the attack on the USS Cole in Yemen, and, eventually, 9/11.’ (CNN)
http://www.cnn.com/2003/US/04/29/wbr.saudi.base/
2. ‘The United [...]