Please....
Intelligence documents, especially the one that would give the higher moral ground to the enemy, are kept in self burning containers. They are not left lying around, and enemy intelligence buildings are the very first thing that a victorious army secure.
In my humble little opinion, those documents were left there for the reporters to find. Sorry, but I have learn in my short life that in war everything goes. Those documents fill the profile of "made" evidence.
Said that, I have no doubt that Al Qaeda and Saddam Hussein were working together against their common enemy, but I don't think that relationship could ever be proven, so some nice guy at Langley made it easier for the US in the Propaganda War by delivering the missing evidence into the hands of couple of very nice reporters, who, of course, are not gonna doubt the papers that will probably give them their 15 minutes of fame.