ONE day in 1981, Israeli warplanes streaked through the skies of Iraq. On that bright clear day, Iraqs nuclear reactor at Osiraq was flattened. Everybody breathed more easily: the status quo had been preserved and the unipolar nuclear balance of power in the Middle East had not changed. Of course tension must be distinguished from peacemeaning the situation determined by one factor: Israel as the only nation possessing the ultimate weapon in this