1997, Mashal was injected in the ear with a toxin (thought to have been a derivative of the synthetic opiate Fentanyl called Levofentanyl). Jordanian authorities apprehended two Mossad agents posing as Canadian tourists and trapped a further six in the Israeli embassy. In exchange for their release, an Israeli physician had to fly to Amman and deliver an antidote for Mashal. The fallout from the failed killing eventually led to the release of Sheik Ahmed Yassin, the founder and spiritual leader of the Hamas movement, and scores of Hamas prisoners. Netanyahu flew into Amman on September 29 to apologize personally to King Hussein, but he was instead met by the King's brother, Crown Prince Hassan. Lebanon The sending of letter bombs to PFLP member Bassam Abu Sharif in 1972. Sharif was severely wounded, but survived. The killing of the Palestinian writer and leading PFLP member Ghassan Kanafani by a car bomb in 1972. The provision of intelligence and operational assistance in the 1973 Operation Spring of Youth special forces raid on Beirut. The targeted killing of Ali Hassan Salameh, the leader of Black September, on January 22, 1979 in Beirut by a car bomb. Providing intelligence for the killing of Abbas al-Musawi, secretary general of Hezbollah, in southern Lebanon in 1992. Allegedly killed Jihad Ahmed Jibril, the leader of the military wing of the PFLP-GC, in Beirut in 2002. Allegedly killed Ali Hussein Saleh, member of Hezbollah, in Beirut in 2003. Allegedly killed Ghaleb Awwali, a senior Hezbollah official, in Beirut in 2004. Allegedly killed Mahmoud al-Majzoub, a leader of Palestinian Islamic Jihad, in Sidon in 2006. Mossad was suspected of establishing a large spy network in Lebanon, recruited from Druze, Christian, and Sunni Muslim communities, and officials in the Lebanese government, to spy on Hezbollah and its Iranian Revolutionary Guard advisors. Some have allegedly been active since the 1982 Lebanon War. In 2009, Lebanese Security Services supported by Hezbollah's intelligence unit, and working in collaboration with Syria, Iran, and possibly Russia, launched a major crackdown which resulted in the arrests of around 100 alleged spies "working for Israel". Previously, in 2006, the Lebanese army uncovered a network that allegedly assassinated several Lebanese and Palestinian leaders on behalf of Israeli intelligence agency Mossad. Palestine Caesarea tried for many years to assassinate Palestine Liberation Organization leader Yasser Arafat, a job later tasked by Israel's Minister of Defense Ariel Sharon to a