with Pretoria. After an unsuccessful meeting with Banda, Machel openly threatened to place missiles on the Mozambique-Malawi border and to prevent trade from landlocked Malawi passing through Mozambican territory. Fatal aircrash and investigations On 19 October 1986, Machel attended a summit in Mbala, Zambia, called to put pressure on Zairean dictator Mobutu Sese Seko, over his support for the Angolan opposition movement UNITA. The strategy of the Front Line States was to move against Mobutu and Banda in an attempt to end their support for UNITA and Renamo, who they regarded as South African surrogates. Although the Zambian authorities invited Machel to stay in Mbala overnight, he insisted on returning to Maputo. He had a meeting scheduled for the following morning at which he intended to reshuffle the leadership of the armed forces. Machel thus overrode the instruction from the Security Ministry that the President should not travel at night – with fatal consequences. The plane never reached Maputo. That night it crashed into a hillside at Mbuzini, just inside South Africa. Machel and 33 others died. Nine people sitting at the back of the plane survived. The Margo Commission, set up by the South African government, but which included high-level international representation, investigated the incident and concluded that the accident was caused by pilot error. Despite the acceptance of its findings by the International Civil Aviation Organization, the report was rejected by the Mozambican and Soviet governments. The latter submitted a minority report suggesting that the aircraft was intentionally lured off course by a decoy radio navigation beacon set up specifically for this purpose by the South Africans. Speculation about the accident has therefore continued to the present day, particularly in Mozambique. Hans Louw, a Civil Cooperation Bureau operative, claims to have helped bring about Machel's death. Pik Botha, South African foreign affairs minister at the time, who later joined the ANC, said that the investigation into the plane crash should be re-opened. The Portuguese journalist, , who lived in Moscow from 1977 to 2015 and currently works for the Portuguese newspaper Público and as a correspondent for the Portuguese television channel SIC, maintains that the plane crash had nothing to do with any attempt or any mechanical failure, but was due to several errors of the Russian crew (including the pilot), who, instead of diligently performing their duties, were busy with futile things, like sharing alcoholic and soft