Communists: Rickety Revisionists v. Leftist Adventurers

American pilots over North Viet Nam have often wondered why the Russian-made SAM missiles that whoosh toward them like floating phone poles have proved to be so ineffectual. A possible answer came last week from Red China in the form of a sneer. Charged Peking's People's Daily: "So far, a great part of the Soviet military equipment supplied to North Viet Nam consists of ob solete equipment discarded by the Soviet armed forces or damaged weapons cleaned out of the warehouse."

The contemptuous blast was the latest round in the strident Sino-Soviet dispute that gets shriller and angrier by the...