Trained, no. Mujahedin were trained by Pakistani Intelligence which Bin Laden was a major contributor to in the late 80's during the Jihad against Russia. So Bin Ladens "men" or what would become Al Qaeda were trained by Pakistani Intelligence which was trained by CIA officials. It's a really complicated situation but this is the most simple way to put it.
Funded, ehhhh kind of. Pakistani intelligence funded two man individuals that later split from the Mujahedin. These were Massoud (later to be the Northern Alliance, Taliban enemy) and Hekmatayr (later lost control of Kabul to the Taliban.) We definitely funded the wrong people and gave money to people that would later become part of the Taliban and Al Qaeda. Especially since Al Qaeda is sunni, we funneled money through Pakistan into Afghanistan. We never directly gave money other than one reported meeting of where someone under James Woosley repotedly gave Hekmatyar $400,000 cash. We did however directly have Pakistan intelligence put stinger missles in the hands of Islamic Fundamentalists (the crazy guys that would later adapt to suicide bombing).
Also it is important to remember the scale of Bin Ladens family and their perception of his actions. He is highly outcasted by his family (which has well over 50 brothers and sisters of Bin Laden.)
It's a very complicated situation and we did give money to bad people, but we never actually gave Osama Bin Laden training or money directly, although it is very easy that he could have recieved stinger missles and funds from loopholes in our tribal warfare system, Pakistani Intelligence faulting, etc. I have done a lot of research on this topic and even met a UN correspondent who lived in Afghanistan for 2 years dealing with such issues. There's also a very good book that will explain mostly everything called Ghost Wars that I highly recommend everyone read.
