Rest In Peace, Stanislav Petrov.
I think we've all seen movies that have imagined cold war tensions stretched to the breaking point, often leveraging the plot device of some faulty warning system or hell-bent commanding officers. Stanislav Petrov (in 1983) and Vasili Arkhipov (in 1962, during the Cuban Missile Crisis) are two real-life heroes who stared into that abyss and turned away. May we never forget what fear and propaganda nearly brought, and the courage of men like these who stood up against it. Rest in peace, sir.
The New York Times published an excellent article on Mr. Petrov that I highly recommend reading. You can view it here.