record, a matter that the United States expressed concern over as well after Orlando Letelier's 1976 assassination in Washington DC.(Kennedy Amendment, later International Security Assistance and Arms Export Control Act of 1976). Cuban involvement After the Chilean military coup in 1973, Fidel Castro promised Chilean revolutionaries far-reaching aid. Initially Cuban support for resistance consisted of clandestine distribution of funds to Chile, human rights campaigns at the UN to isolate the Chilean dictatorship, and efforts to undermine US-Chilean bilateral relations. Eventually Cuba's policy changed to arming and training insurgents. Once their training was completed, Cuba helped the guerrillas return to Chile, providing false passports and false identification documents. Cuba's official newspaper, Granma, boasted in February 1981 that the "Chilean Resistance" had successfully conducted more than 100 "armed actions" throughout Chile in 1980. By late 1980, at least 100 highly trained MIR guerrillas had reentered Chile and the MIR began building a base for future guerrilla operations in Neltume, a mountainous forest region in southern Chile. In a massive operation spearheaded by Chilean Army Para-Commandos, security forces involving some 2,000 troops, were forced to deploy in the Neltume mountains from June to November 1981, where they destroyed two MIR bases, seizing large caches of munitions and killing a number of MIR commandos. In 1986, Chilean security forces discovered 80 tons of munitions, including more than three thousand M-16 rifles and more than two million rounds of ammunition, at the tiny fishing harbor of Carrizal Bajo, smuggled ashore from Cuban fishing trawlers off the coast of Chile. The operation was overseen by Cuban naval intelligence, and also involved the Soviet Union. Cuban Special Forces had also instructed the FPMR guerrillas that ambushed Augusto Pinochet's motorcade on 8 September 1986, killing five bodyguards and wounding 10. Cultural life Influenced by Antonio Gramsci's work on cultural hegemony, proposing that the ruling class can maintain power by controlling cultural institutions, Pinochet clamped down on cultural dissidence. This brought Chilean cultural life into what sociologist Soledad Bianchi has called a "cultural blackout". The government censored non-sympathetic individuals while taking control of mass media. Music scene The military dictatorship sought to isolate Chilean radio listerners from the outside world by changing radio frequencies to middle wavelengths. This together with the shutdown of radio stations sympathetic the former Allende administration impacted music in Chile. The music catalog was censored with the aid of listas negras (black lists) but little