http://www.youtube.com/watch?v=fWoNDxjOksM
If you watch it, you will first see a generic looking bomber. Looks real enough, and probably is.
Next you will see a mushroom cloud. Watch the cloud closely. You will see that it does not change during the time it is shown. But the picture is moving all around. It appears that they took a still photograph, projected it onto a screen, and made a film of it with a movie camera. The camera man moved the camera all around as he took the picture to give the impression he was riding on an airplane, and being jostled around.
The same technique is used latter, toward the end of the video, with the mushroom cloud supposedly over Nagasaki.
Between those, you see another plane from above, in black and white. Then you see a color picture, like a map. A white cloud appears in the center and grows. Then the picture moves, stops, move again. You are supposed to have the impression that this was taken from an airplane. Did the airplane stop, take the picture, and then move on? They weren't using helicopters in WWII.
My conclusion is: Except for the two airplanes, this film was made in a movie studio. It is a fake. You watch it and decide.
