Nostra, they also waged a campaign of murder against journalists, officials, and policemen who dared to cross them. The police were frustrated with the lack of help that they were receiving from witnesses and politicians. At the funeral of a policeman murdered by mafiosi in 1985, policemen insulted and spat at two attending politicians, and a fight broke out between them and military police. Maxi Trial In the early 1980s, magistrates Giovanni Falcone and Paolo Borsellino began a campaign against Cosa Nostra. Their big break came with the arrest of Tommaso Buscetta, a mafioso who chose to turn informant in exchange for protection from the Corleonesi, who had already murdered many of his friends and relatives. Other mafiosi followed his example. Falcone and Borsellino compiled their testimonies and organized the Maxi Trial which lasted from February 1986 to December 1987. It was held in a bunker-courthouse specially built for the occasion, where 475 mafiosi were put on trial, of which, 338 were convicted. In January 1992, the Italian Supreme Court confirmed these convictions. It is considered to be the most significant trial ever against the Sicilian Mafia, as well as the biggest trial in world history. War against the state and Riina's downfall The Mafia retaliated violently. In 1988, they murdered a Palermo judge and his son; three years later, a prosecutor and an anti-mafia businessman were also murdered. Salvatore Lima, a close political ally of the Mafia, was murdered for failing to reverse the convictions as promised. Falcone was killed on May 23, 1992, with of TNT positioned under the highway near Capaci, Sicily. Borsellino was also killed by a car bomb on July 19, 1992. This led to a public outcry and a massive government crackdown, resulting in the arrest of Salvatore Riina in January 1993. More and more informants emerged. Many paid a high price for their cooperation, usually through the murder of relatives. For example, Francesco Marino Mannoia's mother, aunt, and sister were murdered. After Riina's capture, numerous terror attacks were ordered as a warning to its members to not turn state's witness, but also in response to the overruling of the Article 41-bis prison regime. Tourist spots were attacked, such as the Via dei Georgofili in Florence, Via Palestro in Milan, and the Piazza San Giovanni in Laterano and Via San Teodoro in Rome, leaving 10 dead and 93 injured and causing severe damage to