[competentone]

Yep, a lot of people didn't pay attention to the early high altitude balloon research -- including NASA. The accident in the Gemini Program, where we lost astronauts on the launch pad could have been avoided if NASA had listened to the warnings the balloon researchers had given them about equipment and oxygen-rich atmospheres.

Another thing too, that video clip narrator implies that the balloon researchers were somehow testing Einstein's theories -- which is complete nonsense!