Water Armour for Cars.

Spotted by John Robb on his weblog Global Guerrillas (see list of weblogs on the side)

Norwegian scientists have come up with a smart and cheap way of bullet proofing cars by lining the vehicles with flat tanks which, when filled with water, provide excellent protection against gun attack. Each tank is thin, like a domestic radiator, made from plastic or light metal, and has several energy-absorbing carbon-fibre sheets stacked inside.