According to the document referenced on the al-qaeda wikipedia page (which, you know, may or may not be accurate), their goals stretched all the way out to 2020

According to the document referenced on the al-qaeda wikipedia page (which, you know, may or may not be accurate), their goals stretched all the way out to 2020. They didn't intend for the US to change its policies or willingly withdraw, they intended for it to slowly destroy its own economy to the point of collapsing entirely (like the USSR).