Itavia Flight 870
On 27 June 1980, Itavia Flight 870 (IH 870, AJ 421), a Douglas DC-9 passenger jet en route from Bologna to Palermo, Italy, crashed into the Tyrrhenian Sea between the islands of Ponza and Ustica at 20:59 CEST, killing all 81 occupants on board. Known in Italy as the Ustica massacre ("strage di Ustica"), the disaster led to numerous investigations, as well as legal actions and accusations; it continues to be a source of controversy, including claims of conspiracy by the Government of Italy and others.