American apocalypse - 5 likeliest scenarios to topple the US
Which is your favourite apocalyptic scenario? If you really had to choose would it be the intergalactic stand-off? Zombie plague? Over on Slate, Josh Levin and Chris Wilson have been asking people to choose - from of an exhaustive list of 144 potential apocalypses - the scenarios that strike them if not as the best, then as the most likely to precipitate America's downfall.





