The return of "duck and cover," courtesy of the fine folks at the Department of Homeland Security.

Here's the same set of advice in picture format. Note that you can just take a leisurely stroll away from a nuclear blast site, according to the graphics.

Here's the main site.

Here's USA Today's story on the site and the accompanying media campaign.

And remember...

... if you're trapped under debris, avoid unnecessary movement so that you don't kick up dust.