The reasons are that computer errors in nuclear weapons systems precisely at the turn of the millennium can by mistake lead to nuclear war. The early warning systems, which consist of a complex network of satellites, infra-red detectors and horizontal radar rely mainly upon the commercial electricity network.
Das Warnsystem besteht aus einem komplexen Netzwerk von Satelliten, Infrarot-Detektoren und horizontalem Radar und wird hauptsächlich aus dem kommerziellen Stromnetz gespeist.