HOW could three Japanese have flown from Rome to Tel Aviv with a suitcase full of submachine guns and hand grenades undetected? The answer is that they apparently discovered a new flaw in airline security.
The first terrorist threat to jets was skyjacking, which is being countered in several sophisticated ways. They include body searches and hand-baggage checks by magnetometers that can signal the presence of metal and alert security men to weapons. Such techniques are not totally effective; last week a skyjacker demanding $500,000 took over a Western Airlines plane en route from Los Angeles to Seattle. Another armed skyjacker, asking...