In tabulating the accomplishments of AT&T, “Breaking the Connection” omitted a unique and most important project: the Distant Early Warning (DEW) Line. This was a chain of some sixty radar stations designed and installed by a Bell System project team across Arctic North America, extending three thousand miles from northwest Alaska to the east coast of Baffin Island in eastern Canada. This passive defense system has served to detect attempted transpolar transgressions by alien aircraft since 1958.
In late 1952 the Department of Defense handed AT&T a secret study outlining a plan to detect the intrusion into North American airspace of subsonic aircraft. With it was a directive to design, procure, install, and test within two years a prototype installation to determine the feasibility of such a system.