I've been thinking about this for a while now. It seems to me that the US gov't might be using HAARP and Chemtrails to manipulate the changing weather in our favor. If the Jetstream shuts down, all that heat that normall goes to Europe might stay in North America, heating us up to more of a tropical zone. The Mojave and such will be made to be more like the Sahara, and the large cities in Cali might suffer, but the northern US and Canada(norhternUS) would be very habitable.
This would be a brilliant strategic move. All those pesky powerful nations in Eurasia would suffer and all that excess population in Africa would waste away in the heat with no water.
It would bring Manifest destiny to a swift and victorious end, and i could finally throw my winter coat away.
I honestly don't think that anything gets out of the Pentagon unless it's stragegically good for it to do so. That place is TIGHT.