Hi
While blundering around on the Net (as you do) I came across an interesting Wiki I was completely unaware of - the AltHistory Wiki, which includes this alternate universe (amongst many others):
http://althistory.wikia.com/wiki/1983:_Doomsday
I have to confess I hadn't heard of Colonel Petrov (whose action - or should that be inaction in this instance - on the 26th September 1983 was evidently a close call for us all) prior to this morning:
http://en.wikipedia.org/wiki/Stanislav_Petrov
Malcolm