Claim: A video shows an emergency alert system has gone off in the US to warn about an imminent nuclear attack.
Fact-check: Video does not show a real nuclear attack alert in the US - Full Fact
Verdict: the video comes from a 'mock scenario' on youtube, and there have been no such announcements from the organisations responsible for operating the emergency alert system in the us.
Organisation: Full Fact
Author: Evie Townend
Date published: 2024-02-27T00:00:00