I first saw this a while back: maybe 2 years ago, but CR reminded me of it recently. As far as I can tell it is genuine; the CIA offer to sell you it, though if you try to buy you get a 404. Why you'd buy it when others have it for free I don't know. I don't seem to have blogged it then; others did but just to push their own tedious ends (yes, its global cooling come again, don't all switch off at once).
There are a couple of things to look at in a report like this. The most interesting is, presumably, what did the CIA think about climate change then. Slightly less interesting, but revealing…