A cartoon published last year in a Boston newspaper showed two passengers on an aeroplane, one turning to the other to say, “Uh-oh, the stewardesses have changed into their Cuban costumes.” Seventy-five successful hijackings of aircraft of United States and foreign registration in the past nineteen months have dampened this light-hearted approach to the subject. In recent months a bantering remark to a member of a flight crew as to the prospects for a side trip to Cuba has earned more than one passenger a delayed flight, a conversation with an agent of the Federal Bureau of Investigation, or an appearance in court on charges ranging from disturbing the peace to attempted aircraft piracy. For some passengers the hijacking of an aircraft may be a colorful interlude in the routine course of air travel; for the flight crew, the carrier, and the Federal Aviation Administration, it is a nightmare, a vicious form of Russian roulette in which the fate of the hijacker is inconsequential in comparison with the potential cost in lives of passengers and crew, not to speak of the value of the aircraft itself.