You may not realize that, when U.S. Navy SEALs showed up at Osama bin Laden's hideout for the purpose of putting a bullet in his brain, they also carried off a sizeable number of documents pertaining to Al Qaeda's operations around the world, including information about which nations provide substantial support in the form of both financing and access to territory, training facilities and so on.
I'll give you one guess which country was a prominent supporter. I'll give you a hint: Obama and Kerry recently negotiated a deal with this country that relieves it of economic sanctions while making it much easier for it to cheat on inspections of nuclear weapon facilities it is not supposed to have. Any country coming to mind?