Note: There were no hijackings in the United States from 1991 through 2000. Data are through 2000 and do not include the hijacking of 4 airplanes used in attacks on the United States by terrorists on Sept. 11, 2001.

Source: U.S. Department of Transportation, Federal Aviation Administration, Office of Civil Aviation Security, Criminal Acts Against Civil Aviation, available at http://cas.faa.gov/crimacts/pf/crim2000.pdf, as of Feb. 8, 2002.