Civil defense in the United States

1951 film by Anthony Rizzo

U.S. radio/TV system for public alerts of threats to public safety since 1997

false public emergency alert incident in 2018

suggested method of personal protection against the effects of a nuclear explosion

CONELRAD (Control of Electromagnetic Radiation) was a method of emergency broadcasting to the public of the United States in the event of enemy attack during the Cold War. It was intended to allow continuous broadcast of civil defense information to the public using radio stations, while rapidly switching the transmitter stations to make the broadcasts unsuitable for Soviet bombers that might attempt to home in on the signals (as was done during World War II, when German radio stations, based in or near cities, were used as beacons by bomber pilots).

United States Marine Corps Lieutenant General and Governor of Guam (1890-1962)

defunct emergency warning system used in the United States by television and radio stations between 1963 and 1997

government activities to mitigate many threats that endanger society

1979 non-fiction work by Cresson Kearny