Historic trivia sent to me by Kevin Coughlin, in response to Part 1:
Hollywood bombshell Hedy Lamarr invented the concept of frequency hopping so American torpedoes could foil German submarines in WWII. The Jewish-born Lamarr had recently fled Europe and an unhappy
marriage to a Austrian arms manufacturer connected to Hitler and
Mussolini, who frequently took her to business meetings. She developed the idea with composer George Antheil and in 1940 they tried to give the technology to the U.S. Military by presenting it at the National Inventors Council. She was reportedly told "she could better help the war effort by using her celebrity
status to sell War Bonds." The technology was finally adapted by the U.S. Military during the 1962 Cuba missile crisis, and is now used in cell phones and Wi-Fi.
"The U.S. Military really doesn't need your help. Why don't you go sell War Bonds, instead?"