The Canadian Department of National Defense put out a booklet about surviving a nuclear war. It says that the blaze of light from a bomb can cause blindness.

The blast from the explosion can reach up to 15 miles and can start fires up to 20 miles away. The booklet also says that fallout could be the greatest danger to the largest number of Canadians in a nuclear war.

These pictures, taken from the booklet, show you what you should do to protect yourself at the time a bomb is dropped.