Several events prior to Spain's 1982 membership in NATO have also been tied to Gladio. In May 1976, half a year after Franco's death, two Carlist militants were shot down by far-right terrorists, among whom were Gladio operative Stefano Delle Chiaie and members of the Apostolic Anticommunist Alliance ("Triple A"), demonstrating connections between Gladio and the South American "Dirty War" of the Operation Condor. This incident became known as the Montejurra incident. According to a report by the Italian CESIS (Executive Committee for Intelligence and Security Services), Carlo Cicuttini (who took part in the 1972 Peteano bombing in Italy alongside Vincenzo Vinciguerra), participated in the 1977 Massacre of Atocha in Madrid, killing five people (including several lawyers), members of the Workers' Commissions trade-unions closely linked with the Spanish Communist Party. Cicuttini was a naturalized Spaniard and exiled in Spain since 1972 (date of the Peteano bombing).