A clip from the BBC special on Hiroshima.
The world changed.
Atomic and nuclear weapons are still largely misunderstood by the average person.
There are several films available on youtube concerning nuclear weapons. Many are thinly veiled works of peace propaganda. Never the less, they are educational to watch. Search for The War Game 1965, QED - A Guide to Armageddon, The Day After, Testament, The Atomic Cafe, and others.