As far as I remember that story about "vacuum tube hindsight" is from a documentary on History Channel(?) about Soviet pilot Viktor Belenko [1] defecting by lan

As far as I remember that story about "vacuum tube hindsight" is from a documentary on History Channel(?) about Soviet pilot Viktor Belenko [1] defecting by landing his Mig 25 in Japan, thereby letting the west get their hands on the most advanced soviet plane at the time [2]. [1] https://en.wikipedia.org/wiki/Viktor_Belenko https://en.wikipedia.org/wiki/Viktor_Belenko [2] https://en.wikipedia.org/wiki/Mikoyan-Gurevich_MiG-25#Western_intelligence_and_the_MiG-25 https://en.wikipedia.org/wiki/Mikoyan-Gurevich_MiG-25#Wester...