That's strange, because I've seen literally dozens of articles and "experts"(such as Hazhir Teimourian, who occasionally works for the Times) stating that the U.S did, infact, fund the Maktab al-Khidmat, the group that Osama Bin Laden was a crucial part of during the the 80's. Now, I have seen varying reports of whether or not(and to what extent) the CIA directly trained Bin Laden, but the one constant among them did seem to be that the U.S sponsored several Afghan resistance groups fighting against the Soviets, including the Maktab al-Khidmat.
This certainly wouldn't be the first time the U.S has helped fund foreign militant groups. They did have a common enemy. "Politics makes for strange bedfellows", as they say.