Men and materials moved north by air last week to launch the biggest arctic defense project the U.S. and Canada have yet undertaken: construction of the Distant Early Warning line (DEW). When the system is finished in about two years, its radar and other detection devices will keep around-the-clock alert from the Yukon to Greenland against intruding Soviet aircraft.
Massachusetts Institute of Technology's Lincoln Project scientists first recommended construction of the far-north warning line three years ago. Their estimate of its cost: $1 billion. At a time when the Soviet Union's best...