Nike-X was an anti-ballistic missile (ABM) system designed in the 1960s by the US Army to protect major cities in the United States from attacks by the Soviet Union's intercontinental ballistic missile (ICBM) fleet during the Cold War.

Nike-X - Wikipedia

Nike-X was an anti-ballistic missile (ABM) system designed in the 1960s by the US Army to protect major cities in the United States from attacks by the Soviet Union's intercontinental ballistic missile (ICBM) fleet during the Cold War.

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