2012 marks the 50th anniversary of the Cuban Missile Crisis, the closest the world has come to all out nuclear war. In 2002 the Discovery Channel produced and aired a one-hour special entitled Defcon 2 and narrated by Tom Clancy. Defcon stands for defense condition and 2 is the degree that precedes nuclear war. This stand off between the US and the Soviet Union was the last time Defcon 2 was declared.
The entire documentary may be viewed on YouTube in six parts and the links to each part are posted below.