Weapon physicist declassifies rescued nuclear test films
They used cameras that could do 15 million frames per second:<p><a href="https://www.youtube.com/watch?v=KQp1ox-SdRI" rel="nofollow">https://www.youtube.com/watch?v=KQp1ox-SdRI</a>
<a href="https://en.wikipedia.org/wiki/Rapatronic_camera" rel="nofollow">https://en.wikipedia.org/wiki/Rapatronic_camera</a>