Numerous training exercises are held around the US, based on the scenario of terrorist attacks that involve aircraft hijackings. Richard Clarke, the counterterrorism “tsar” from 1998 until October 2001, will later testify that, before 9/11: “In many, many cities and probably most metropolitan areas, the FBI had worked with the state and local authorities to plan responses to certain kinds of terrorist attacks. We then held a series of exercises around the country. For example, on weapons of mass destruction attacks, we had had a whole series of exercises about hijackings of aircraft.” [US Congress, 6/11/2002 ] Further details of these exercises, such as the specific period over which they occur, are unstated. According to a 1999 report by the General Accounting Office, between June 1995 and June 1998 the FBI leads 24 training exercises in which “some state and local organizations” also participate. These exercises include various scenarios including, among others, “aircraft hijackings” and “terrorist attacks.” [United States General Accounting Office, 6/25/1999, pp. 1 and 41
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