I don't think it's fair to say he did nothing. He did two very important things: 1) Analysed the available information and determined that it was a false alert

I don't think it's fair to say he did nothing. He did two very important things: 1) Analysed the available information and determined that it was a false alert. 2) Actively passed on his assessment that it was a false alert to his superiors. So it would be fairer to say "Man Who Saved the World by Using His Smarts and Responding Decisively."