duck and cover

I am a child of the cold war. I remember being in second or third grade and hearing the teacher yell, “Drop,” as we were expected to take cover under our desks. I can remember the surging interest in bomb shelters and when I was old enough to laugh at the idea that “duck and cover” would have any value. Why the nostalgia? Because last week New York City released a public service announcement about how to survive a nuclear attack – valuable information in case one were to occur.  
A lot of my time -- a lot more than writing on most days -- is spent reading. Here are a few articles I came across this week where the author said it all. So rather than providing a rewrite, here are the primary sources.