That was only 1 of a series of government media about covering up, it wasnt the only one. I was referring more to the urban ones.
When you have a nuclear blast, there is all sorts of stuff flying about, in an urban area most noticeabley its glass, its better if you avoid all this, you're still fucked shortly after from radiation poisoning though of course, lol

Reality is the government have to put people's fears at rest, and the advice they were giving wasnt wrong, you ARE better off ducked and covered than stood upright staring at the bright light.