In 1955, the Civil Defense Administration released a brochure titled 'Four Wheels to Survival.' It was about how you can use your car to get away from danger, transport supplies, and live in it if need be.
One section said that current (in 1955) production cars with rounded tops offered good protection against atomic blasts. There was a catch, though: You had to roll your windows down to prevent glass breakage, then quickly roll them up after the blast to prevent possible radioactive dust from getting into the car.
Well, at least it's better than hiding under a desk. Right?
