The protestors warn that if America shoots down a missile over Britain it would shower the country in radioactive debris.

BBC: Menwith Hill: Centre of Star Wars storm

Unlike a fallout shelter that protects from radioactive debris, the main purpose of the building was to protect from shock waves and overpressure.

FORBES: Connect

Unless it somehow managed to burrow a very long way down before exploding, such a weapon detonated beneath the earth's surface would throw up huge amounts of radioactive debris, a danger to all.

ECONOMIST: Why some weapons are best left unexplored