1100 Declassified U.S. Nuclear Targets from 1956

[Builder]

You can zoom and pan the map:

http://futureoflife.org/background/us-nuclear-targets/

[Fanna]

What a lovely map. Good find.

[Atlas]

ACCIDENTAL NUCLEAR WAR: A Timeline of Close Calls
http://futureoflife.org/background/nuclear-close-calls-a-timeline/

http://futureoflife.org/wp-content/uploads/2016/02/nuclear-close-calls-220x100.jpg

October 27, 1962
Soviet Sub Captain Decides to Fire Nuclear Torpedo During Cuban Missile Crisis
This may be the closest call of all.
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[bogeyman]

Basically destroying modern civilisation. The hype and paranoia of the cold war was intensified due to lack of communication and processes used. It is a common problem even today.