al Qaeda knows that the more resources we shovel into our various military adventures, and the more of our men and women in uniform we send to their deaths in our military adventures, the sooner the US empire will collapse (just as happened with the Soviet Union - remember the role the USSR's efforts in places like Afghanistan played in helping to bring about its eventual collapse, and the role the US played in helping to hasten this outcome through its support of the Mujahideen), which is why al Qaeda are so eager for us to get involved in more of them, and why they are so eager for us to continue to bleed ourselves dry in Iraq.

They know, even if we do not, that our financial and personnel resources, and our resolve are not limiteless. They also know, even if we do not, that the longer we continue to bleed ourselves dry in places like Iraq and Afghanistan, the worse shape we will be in when our empire finally does collapse.

Which is why they so totally love GW Bush and his administration.