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of the original DEW stations were deactivated, while a small number were upgraded with all-new equipment. The official handover from DEW to NWS took place on 15 July 1993.

Introduction

The shortest, or great circle, route for a Soviet air attack on North America was through the Arctic, across the area around the North Pole. The DEW Line was built during the Cold War to give early warning of a Soviet nuclear strike,

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