Happy Stanislav Petrov Day.
"On 26 September 1983 Petrov was the duty officer at the command center for the Oko nuclear early-warning system when it reported that up to five missiles had been launched from the United States. Petrov correctly judged the reports to be a false alarm. His decision to disobey orders is credited with having prevented a retaliatory attack on the United States and its NATO allies that would have likely resulted in a large-scale nuclear war."
https://en.wikipedia.org/wiki/Stanislav_Petrov