How many of you remember the movie Duck and Cover? It really wasn't a movie but more of a "short" — just over nine min­utes in length. But don't sell it short — it featured a great leading role, Bert the Turtle, and a very catchy theme song:

There was a turtle by the name of Bert
and Bert the turtle was very alert;
when danger threatened him he never got hurt
he knew just what to do ...
He ducked!
And covered!
Ducked!
And covered! He did what we all must learn to do
You and you and you and you!
Duck, and cover![1]

In what looks like a dramatized cartoon, Bert the Turtle fol­lows the "duck and cover" rule when a monkey dangles a fire­cracker over his head and survives the blast. But then the movie takes a more serious tone as live footage of a nuclear blast is run, and viewers are assured…