The site here is near where the nuclear incident occurred -- Serpukhov-15.

Stanislav Yevgrafovich Petrov (Russian: Станисла́в Евгра́фович Петро́в; born c. 1939) is a retired lieutenant colonel of the Soviet Air Defence Forces. On September 26, 1983, he was the duty officer at the command center for the Oko nuclear early-warning system when the system reported a missile being launched from the United States. Petrov judged that the report was a false alarm. This decision is credited with having prevented an erroneous retaliatory nuclear attack on the United States and its NATO allies, which would have likely resulted in large-scale nuclear war. Investigation later confirmed that the satellite warning system had malfunctioned.^[2]

• http://en.wikipedia.org/wiki/Stanislav Petrov