I don't buy it. Here's a 15kt explosion: http://youtu.be/B9F-l_3eLcE?t=9m http://youtu.be/B9F-l_3eLcE?t=9m I've never witnessed a nuclear explosion first-hand,

I don't buy it. Here's a 15kt explosion: http://youtu.be/B9F-l_3eLcE?t=9m http://youtu.be/B9F-l_3eLcE?t=9m I've never witnessed a nuclear explosion first-hand, but that seems like a mighty small flash for a nuclear explosion. Edit: Also, why don't we hear any EMP effects on the radio signal in http://www.youtube.com/watch?v=tJOJ6B2XOyA http://www.youtube.com/watch?v=tJOJ6B2XOyA ? If anything, the audio gets clearer right at the point you seem to be claiming is a nuclear detonation.