Authorities are aware of, and concerned about, the possibility of a suicide attack using a hijacked plane, according to a paper on the threat of terrorism against commercial aviation by Brian Michael Jenkins of the RAND Corporation. “The nightmare of governments is that suicidal terrorists will hijack a commercial airliner and, by killing or replacing its crew, crash into a city or some vital facility,” the paper says. “It has been threatened in at least one case: In 1977, an airliner believed to have been hijacked, crashed, killing all on board. And in 1987, a homicidal, suicidal ex-employee boarded a commercial airliner where he shot his former boss and brought about the crash of the airliner, killing all 44 on board. Fear of such incidents is offered as a powerful argument for immobilizing hijacked aircraft on the ground at the first opportunity and also, some argue, for armoring the flight deck.” The paper asks: “What are we likely to see in the future? Perhaps fewer but deadlier and more sophisticated terrorist hijackings.” [Jenkins, 3/1989, pp. 10-11] The 1987 incident refers to Pacific Southwest Airlines Flight 1771, which is believed to have been hijacked on its way from Los Angeles to San Francisco by a disgruntled former employee. [Time, 12/21/1987] Jenkins will repeat his warning of terrorists possibly using a plane as a weapon in a threat assessment for the New York Port Authority in 1993 (see After February 26, 1993). [Jenkins and Edwards-Winslow, 9/2003, pp. 11 ]