"The Federal Aviation Administration's Office of Civil Aviation Security maintains records of aircraft hijackings, bombing attacks, and other significant criminal acts against civil aviation worldwide. These records include actual and attempted hijackings: explosions aboard aircraft, at airports, and at airline offices; and other selected criminal acts against civil aviation. These offenses represent serious threats to the safety of civil aviation and, in those incidents involving U.S. air carriers or facilities outside the United States, are often intended as symbolic attacks against the United States. This edition summarizes events which occurred during 1989 and places the events in perspective within a 5-year period."
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/