widely believed that the attack was in response to Israel having forced down a jet, two months earlier, carrying Syrian officials to Damascus, which Israel had supposed was carrying senior Palestinians. Pan Am Flight 73 On 5 September 1986, four ANO gunmen hijacked Pan Am Flight 73 at Karachi Airport on its way from Mumbai to New York, holding 389 passengers and crew for 16 hours in the plane on the tarmac before detonating grenades inside the cabin. Neerja Bhanot, the flight's senior purser, was able to open an emergency door, and most passengers escaped; 20 died, including Bhanot, and 120 were wounded. The London Times reported in March 2004 that Libya had been behind the hijacking. Relationship with Gaddafi Abu Nidal began to move his organization out of Syria to Libya in the summer of 1986, arriving there in March 1987. In June that year the Syrian government expelled him, in part because of the Hindawi affair and Pan Am Flight 73 hijacking. He repeatedly took credit during this period for operations in which he had no involvement, including the 1984 Brighton hotel bombing, 1985 Bradford City stadium fire, and 1986 assassination of Zafer al-Masri, the mayor of Nablus (killed by the PFLP, according to Seale). By publishing a congratulatory note in the ANO's magazine, he also implied that he had been behind the 1986 Space Shuttle Challenger disaster, writes Seale. Abu Nidal and Libya's leader, Muammar Gaddafi, allegedly became great friends, each holding what Marie Colvin and Sonya Murad called a "dangerous combination of an inferiority complex mixed with the belief that he was a man of great destiny". The relationship gave Abu Nidal a sponsor and Gaddafi a mercenary. Seale reports that Libya brought out the worst in Abu Nidal. He would not allow even the most senior ANO members to socialize with each other; all meetings had to be reported to him. All passports had to be handed over. No one was allowed to travel without his permission. Ordinary members were not allowed to have telephones; senior members were allowed to make local calls only. His members knew nothing about his daily life, including where he lived. If he wanted to entertain, Seale writes, he would take over the home of another member. According to Abu Bakr, speaking to Al Hayat in 2002, Abu Nidal said he was behind the bombing of Pan Am Flight 103,