Watch how the ISI managed to Enter CIA compound where the NATO was planning a strike inside Pakistan.

"There are rumors. They're persistent," Ignatius said. The ISI is so complicated partially because, Ignatius says, the U.S. asked it to recruit among Islamic fundamentalists at the time when America had decided the best way to drive the Soviets out of Afghanistan was to effectively organize a Jihad against them. Now, the U.S. is asking for the ISI's help in cracking down on, for instance, the Haqqani network that has been killing American and NATO soldiers in Afghanistan - but Ignatius says we "have to be honest enough to remember" that the Haqqani network first came into power because the U.S. provided the money and training for its members decades ago.