One Reason the US Isn't Destroying All Its Nukes: Killer Asteroids

Among the few apocalypses worse than nuclear annihilation, asteroid impact has got to be near the top of the list—at least if Hollywood's depictions are any indication. Luckily, the American public has at least one agency defending it against errant space rocks: the exact same agency that's supposed to be protecting… » 10/01/14 6:40pm 10/01/14 6:40pm