Raw video shows the final preparation and loading of the bomb, and the subsequent explosion on Nagasaki.
This footage comes from Los Alamos National Laboratory. It was edited by Alex Wellerstein just to add some interesting notes on the bomb and what can be seen in the video.
It’s pretty long but it is the first film to show the final preparation and loading of the “Fat Man” bomb into “Bockscar,” the B-29 Superfortress bomber which dropped the bomb on Nagasaki.
It also shows the Nagasaki explosion from the window of an observation plane.
But, read the notes, as they are really interesting.
H/T to Bjorn Broten for the heads-up