November 15, 1979: ’Unabomber’ Explosive on Plane Fails to Detonate, Catches Fire Instead

A parcel mailed from Chicago catches fire in a mailbag aboard American Airlines Flight 444 from Chicago to Washington, DC. The package contains a bomb which was apparently constructed to explode inside the cargo hold. Twelve passengers are treated for smoke inhalation; the flight conducts an emergency landing at Dulles Airport near Washington. [BBC, 11/12/1987; Washington Post, 1998] The bomb does not ignite because instead of explosive powder, it contains barium nitrate, a powder often used to create green smoke in fireworks. [World of Forensic Science, 1/1/2005] The bombing is later shown to be the work of Theodore “Ted” Kaczynski, the so-called “Unabomber” (see April 3, 1996). After the airline bombing and the subsequent bombing of a United Airlines executive (see June 10, 1980), the FBI ties the previous bombings (see May 25-26, 1978 and May 9, 1979) to this one and code-names the file UNABOM, for “UNiversity and Airline BOMber.” The media will soon dub the unknown assailant the “Unabomber.” [Washington Post, 4/4/1996; World of Forensic Science, 1/1/2005] Kaczynski will later express regret for trying to bomb the plane (see April 24, 1995).