The Atom Strikes ! 1946 Film video movie

[william]

This official U.S. Federal government film reports on the damage done by the atomic strikes on Hiroshima and Nagasaki. Blast, flash/heat, and radiation effects are examined, starting from the epicenter and working outwards. The film also contains an interview with a Jesuit priest who was present in Hiroshima on the day of the strike.

The atomic weapons used in the bombing of Japan were around 20 kt. Now scale that up to 100 to 500kt and you'll get an idea of what a modern nuclear exchange would do today!