AFTER three years of ever more furious combat, after dozens of feints and one-sided gestures toward conciliation, the U.S. and North Viet Nam finally moved in the same direction at the same time. The first half step, when it occurred, was just as swift as it was unforeseen.
It came last week when President Johnson dramatically restricted the U.S. bombing of North Viet Nam without demanding any reciprocal restraint by the Communists. North Viet Nam, in turn, agreed to the first significant face-to-face diplomatic contact with the U.S. since embassy-level talks in Moscow 14...