of Lebanon by Israel during the 1982 Lebanon War. Following massive raids by Israeli forces in Beirut, it is estimated that 8,000 PLO fighters evacuated the city and dispersed. On 1 October 1985, in Operation Wooden Leg, Israeli Air Force F-15s bombed the PLO's Tunis headquarters, killing more than 60 people. It is suggested that the Tunis period (1982–1991) was a negative point in the PLO's history, leading up to the Oslo negotiations and formation of the Palestinian Authority (PA). The PLO in exile was distant from a concentrated number of Palestinians and became far less effective. There was a significant reduction in centres of research, political debates or journalistic endeavours that had encouraged an energised public presence of the PLO in Beirut. More and more Palestinians were abandoned, and many felt that this was the beginning of the end. Second Intifada The Second or Al-Aqsa Intifada started concurrently with the breakdown of July 2000 Camp David talks between Palestinian Authority Chairman Yasser Arafat and Israeli Prime Minister Ehud Barak. The Intifada never ended officially, but violence hit relatively low levels during 2005. The death toll, including both military personnel and civilians, of the entire conflict in 2000–2004 is estimated to be 3,223 Palestinians and 950 Israelis, although this number is criticized for not differentiating between combatants and civilians. Members of the PLO have claimed responsibility for a number of attacks against Israelis during the Second Intifada. The PLO has been sued in the United States by families of those killed or injured in attacks by Palestinians. One lawsuit was settled prior to going to trial. The other went to trial. The PLO was found liable for the death and injuries of US citizens in a number of terrorist attacks in Israel from 2001 to 2004 and ordered to pay a judgment of $655.5 million. The verdict was overturned on appeal for a lack of US federal jurisdiction over actions committed overseas. Wealth controversy According to a 1993 report by the British National Criminal Intelligence Service, the PLO was "the richest of all terrorist organizations", with $8–$10 billion in assets and an annual income of $1.5–$2 billion from "donations, extortion, payoffs, illegal arms dealing, drug trafficking, money laundering, fraud, etc." Estimates of the Palestine Liberation Organization's alleged hidden assets vary wildly and only Arafat had the whole picture. A former PLO finance minister said it was $3 billion to $5