Until last fortnight there had been many incidents but no serious outbreaks on Israel's borders since U.N. Secretary General Dag Hammarskjold won his cease-fire last April. At that point, however, Hammarskjold, the usually quiet Swede, felt impelled to make a loud protest. He announced that he would demand that the Jordan government "punish the transgressors" who killed four Israeli bus passengers a few nights earlier. He had no sooner fired off his warning shot than another flare-up occurred on Israel's touchier border with Egypt.
After two minor attacks on Israelis in the Negev desert, two parties of Israelis carried out...