looking at the situation, i think it will start in south america(hugo chavez-venesuela) and (colombia) colombia will ask to US to help them out(destry chavez undercover) and hugo chavez will ask Russia and Iran to support them. I see this after all troops comeback home from iraq and afganistan.
I wouldn't do it. But it depends on the value of the cars to you as well, not just market values. If you live in a northern climate, the Explorer will be better in the snow and ice, even though it's only 2WD. If gas prices are a big issue in your state, you may want to go with the Civic...