<iframe width="580" height="385" src="https://www.youtube.com/embed/quM5obcn8R0?autoplay=1" frameborder="0" allowfullscreen></iframe> <br>On a September night in 1983, Soviet lieutenant colonel Stanislav Petrov stood guard at a satellite-based missile launch detection system. When the alarm went ... <br><a href="https://www.youtube.com/watch?v=quM5obcn8R0">source</a>