“The alert — a template intended to be sent to only one user as part of a notification test — was accidentally distributed to the entire wing that afternoon, Maj. Bryon McGarry, chief of public affairs for the 52nd, said in an email Wednesday. It was mistakenly sent to networked computers over the AtHoc emergency alert system. Labeled ‘Severity: High,’ the alert warned, in all caps, ‘MISSILE INBOUND. SEEK SHELTER IMMEDIATELY!’ “
Source: Mistaken missile warning surprises airmen at Spangdahlem