What about before the movie? How about what happened on the day of that "exotic" explosion? Don't forget about how long engineering that nuclear bomb took, for than four hours that's for sure. You could assume that the new movie describing some of that that happened on the test explosion day could not have included it all. Maybe they even thought to include it all, but realized there was too much. Too many people, perhaps. That has to be true because they left out a few "minor characters".  Such as one no one can quite make out. While there is little proof, there's proof of a man or woman who was involved in this experiment. It sometimes seems he or she was never real.  I think they were, though. 

I'll begin by bringing from the movie to help those who are not as completely pre-informed about the storyline. In the movie, we see an assistant to the experiment preparing to set off this bomb for testing. If this test works, it will be the true invention of the nuclear bomb. So, this man is waiting to press the singular button that would determine our future in battle, which he isn't sure is safe. He waited a moment before pressing the activating button. At that moment, going through his head, he reconsidered his assignment. He was not going to press that button. However, a ghost-like figure spoke to him. We aren't exactly sure what this figure spoke about, but it was convincing. Either that or the phantom pressed his hand into the button. 

Of course, the man didn't explain this to others because he would be discredited. We are only aware of this because a stand-by participator saw this shadow whispering behind a not-so-solid hand into the ear of the assigned button presser. This was found out and discussed during the legal matters handled in private discussion rooms. It was not included in the movie because it was found unimportant.