indeed, the Oklahoma part of this is troubling. if AQ was going to conduct an operation and had choice of a target, something like the exiting crowd at fenway park would have gotten them alot more visibility.
I suspect Al Queda would like to demonstrate that they can hit us anywhere, anytime; that not even the heartland is safe.
Al Qaeda has an infrastructure and sympathizers at the University of Oklahoma. The guy could have been a leftover sleeper from the 9/11 cell.