It was a moment that thousands of U.S. moppets would long remember. Jack Armstrong, the All-American Boy,* had just leaped, with suitable sound effects, from a plane. The hero wore a suit of armor and two parachutes. But one chute failed to open. Then it developed that something was wrong with the other chute, too. Jack plunged earthward. . . .
By that time it was 6:44 p.m., E.D.T. and the announcer broke in with the standard cliffhanger: tune in tomorrow and hear what happened. Next day, listeners learned that Jack had survived: he..