at the Israeli controlled Sabra and the Shatila refugee camp. On 25 September 1982 Peace Now held a mass protest in Tel Aviv in order to pressure the government to establish a national inquiry commission to investigate the massacres, as well as calling for the resignation of the defence minister Ariel Sharon. Peace Now's 1982 demonstration was attended by 400,000 people, approximately 10% of Israel's population at the time. Subsequently, the Israeli government established the Kahan Commission on 28 September 1982. Four months later the commission found Israel to be indirectly responsible for the massacres, and recommended Ariel Sharon's resignation. Israeli Prime Minister Menachem Begin at first refused to adopt the Kahan Commission's recommendations. Consequently, Peace Now decided to hold a demonstration on 10 February 1983 that marched from Zion Square towards the Prime Minister's residence in Jerusalem in order to pressure the government to do so. Emil Grunzweig In the wake of the Sabra and Shatila massacre, Peace Now led a march from Zion Square and moved towards the Prime Ministers' Office in Jerusalem on 10 February 1983. During the march Peace Now demonstrators encountered a group of right-wing activists. In the ensuing confrontation, Yona Avrushmi tossed a hand-grenade into the crowd, killing Emil Grunzweig, a prominent Peace Now activist, and injuring several others. Yona Avrushmi was duly arrested, convicted of murder and given a mandatory life sentence, which was commuted to 27 years by President Ezer Weizman in 1995. Avrushmi was released on 26 January 2011. As a result of mounting public pressure on Menachem Begin to adopt the Kahan Commission's recommendations Ariel Sharon agreed to step down as Defence Minister. However, he remained in the government as a minister without portfolio. Peace Now and the First Intifada (1987–1993) In 1988 Yasser Arafat (Chairman of the PLO) publicly accepted United Nations Security Council Resolution 242 at the PNC in Algiers. For the first time, Yasser Arafat accepted Israel's existence according to its borders set out in United Nations General Assembly Resolution 181, and rejected and condemned the use of terrorism in all its forms. In reaction Peace Now led a demonstration of more than 100,000 people, calling for immediate Israeli-Palestinian negotiations for the purposes of attaining peace between the two parties. Following this, Peace Now led the Hands Around Jerusalem event, in which 25,000 Israelis and Palestinians linked hands to encircle the walls of the Old City of