Once upon a time, back in the 1950s, Groucho Marx was the host of a popular radio and then TV program called You Bet Your Life. Maybe that was why some Civil Defense official decided that he was the best person to tell people about how they can survive a nuclear war.
That’s my theory anyway. The only problem is he never actually says the words, “you bet your life” in the radio commercial. Feel free to let me know why Groucho Marx was the man for this job.