Canada and the United States agree to construct the <a href="https://en.wikipedia.org/wiki/Distant_Early_Warning_Line" id="mw8A" rel="mw:WikiLink" title="Distant Early Warning Line">Distant Early Warning Line</a>, a system of <a href="https://en.wikipedia.org/wiki/Radar" id="mw8Q" rel="mw:WikiLink" title="Radar">radar</a> stations in the far northern Arctic regions of Canada and Alaska.