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A radar system in North America set up during the Cold War for the early detection of a missile attack.
- ‘The north warning system replaced the distant early warning line in the early 1990s and is used to provide surveillance of potential attack routes via Arctic airspace.’
- ‘The DEW Line was designed to provide distant early warning of manned bomber or intercontinental ballistic missile attacks.’
- ‘Fifty years ago last month, Canada and the United States approved the construction of the distant early warning line.’
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