Distance: The farther away you are from the nuclear blast the lower your exposure.

Most Americans run at 6 - 8 miles per hour (mph).

The blast wave of a nuclear explosion travels at 964 mph.

Time: Minimizing time spent exposed will also reduce your risk.

Americans in contact with the 240,000 degree heat of a nuclear blast risk "vaporization" after exposures longer than 0.001 seconds.

Go to the nearest building.

If you are ten miles from the blast itself, you will have 2.5 seconds before the blast wave arrives.

Seek safety in the basement or cellar...

...particularly in an approved fallout shelter.

If you moved quickly in Step 2, you may have one or even 1.5 seconds to work with.

Observe all Federal smoking regulations. Smoking is not permitted in government buildings or public fallout shelters. Violators are subject to fine or imprisonment.

Sit on the floor, positioning yourself with your back against the fallout shelter wall, placing your head firmly between your legs.