Three of the targets on the Mossad's list lived in heavily guarded houses in Lebanon that were beyond the reach of previous assassination methods. In order to assassinate them, Operation Spring of Youth was launched as a sub-operation of the larger "Wrath of God" campaign. On the night of April 9, 1973, Sayeret Matkal, Shayetet 13, and Sayeret Tzanhanim commandos landed on the coast of Lebanon in Zodiac speedboats launched from Israeli Navy missile boats offshore. The commandos were met by Mossad agents, who drove them to their targets in cars rented the previous day, and later drove them back to the beaches for extraction. The commandos were disguised as civilians, and some were dressed as women. In Beirut, they raided guarded apartment buildings and killed Muhammad Youssef al-Najjar (Operations leader in Black September), Kamal Adwan (a Chief of Operations in the PLO) and Kamal Nasser (PLO Executive Committee member and spokesman). During the operation, two Lebanese police officers, an Italian citizen, and Najjar's wife were also killed. One Israeli commando was wounded. Sayeret Tzanhanim paratroopers raided a six-story building that served as the headquarters of the Popular Front for the Liberation of Palestine. The paratroopers met strong resistance and lost two soldiers, but managed to destroy the building. Shayetet 13 naval commandos and Sayeret Tzanhanim paratroopers also raided PLO arms-manufacturing facilities and fuel dumps. Some 12–100 PLO and PFLP members were killed during the attacks.Three attacks quickly followed the Lebanon operation. Zaiad Muchasi, the replacement for Hussein Al Bashir in Cyprus, was killed by a bomb in his Athens hotel room on April 11. Two minor Black September members, Abdel Hamid Shibi and Abdel Hadi Nakaa, were seriously injured when their car was bombed in Rome.Mossad agents also began to follow Mohammad Boudia, the Algerian-born director of operations for Black September in France, who was known for his disguises and womanizing. On June 28, 1973, Boudia was killed in Paris by a pressure-activated bomb packed with heavy nuts and bolts placed under his car seat.On December 15, 1979, two Palestinians, Ali Salem Ahmed and Ibrahim Abdul Aziz, were killed in Cyprus. According to police, both men were shot with silenced weapons at point-blank range.On June 17, 1982, two senior PLO members in Italy were killed in separate attacks. Nazeyh Mayer, a leading figure in the PLO's Rome office, was shot dead outside his home. Kamal Husain, deputy director of the PLO office in Rome, was killed by a shrapnel bomb placed under the back seat of his car as he drove home, less than seven hours after he had visited the home of Mayer and helped the police in their investigation.On July 23, 1982, Fadl Dani, deputy director of the PLO office in Paris, was killed by a bomb that had been placed in his car. On August 21, 1983, PLO official Mamoun Meraish was killed in his car in Athens by two Mossad operatives who shot him from a motorcycle.On June 10, 1986, Khaled Ahmed Nazal, Secretary-General of the PLO's DFLP faction, was gunned down outside a hotel in Athens, Greece. Nazal was shot four times in the head. On October 21, 1986, Munzer Abu Ghazala, a senior PLO official and member of the Palestinian National Council, was killed by a bomb as he drove through a suburb of Athens.On February 14, 1988, a car bomb exploded in Limassol, Cyprus, killing Palestinians Abu Al Hassan Qasim and Hamdi Adwan, and wounding Marwan Kanafami.

Question: Who did Zaiad Muchasi replace?
Answer: Hussein Al Bashir