The National Security Archive has just made available a video, "The Power of Decision," produced in 1956-57, which they say "may be the first (and perhaps the only) U.S. government film depicting the Cold War nightmare of a US-Soviet nuclear conflict."
This is the year that planning was underway for the first Pugwash Conference. I am posting this video since it gives a sense of the urgency of the times, and vividly demonstrates the nuclear dangers that were then foremost in the minds of many. (Many of these dangers still exist today, though that is a subject for another post...)
Here is a 4 minute clip from The National Security Archives You Tube Channel:
The full film is available on the National Security Archives website, here.