The FBI has linked these attacks to the Unabomber:
May 25-26, 1978: A package is found at a parking lot at University of Illinois at Chicago and brought to Northwestern University in Evanston because of the return address. It explodes when it is opened on May 26, injuring one person.May 9, 1979: One person injured at Northwestern University.
Nov. 15, 1979: 12 people suffer smoke inhalation when bomb explodes in plane's cargo hold during American Airlines flight, forcing an emergency landing at Dulles International Airport near Washington.
June 10, 1980: United Airlines president injured at home in Chicago area.
Oct. 8, 1981: Bomb placed in a business classroom at University of Utah in Salt Lake City. No one injured.
May 5, 1982: One person injured at Vanderbilt University in Nashville; package addressed to a professor. The package was postmarked from Brigham Young University in Utah.
July 2, 1982: Professor of electrical engineering and computer science injured in faculty lounge at University of California, Berkeley.
May 15, 1985: One person injured by bomb found in computer room at University of California, Berkeley.
June 13, 1985: Package that was mailed to The Boeing Co. in Auburn, Wash., on May 8 is discovered and safely disarmed. The package was postmarked Oakland, Calif.
Nov. 15, 1985: Two people injured by package mailed to professor at University of Michigan at Ann Arbor. The professor, who was standing nearby, wasn't hurt.
Dec. 11, 1985: Hugh Scrutton, 38, killed by bomb found near his computer rental store in Sacramento, Calif.
Feb. 20, 1987: Man injured by bomb left behind computer store in Salt Lake City.
June 22, 1993: Geneticist at University of California, San Francisco, injured by bomb sent to his home. The package was postmarked Sacramento.
June 24, 1993: Yale University computer scientist David Gelernter injured in office. The package was postmarked Sacramento.
Dec. 10, 1994: Advertising executive Thomas Mosser, 50, killed by bomb sent to his North Caldwell, N.J., home. The package was postmarked San Francisco.
April 24, 1995: California Forestry Association President Gilbert P. Murray, 47, killed opening a mail bomb in the group's Sacramento headquarters. The package was postmarked Oakland, Calif.