Palestinians Swear Vengeance For Killing of Cleric by Israelis.

Reports that Palestinians are vowing revenge for the killing of Hamas cleric Sheik Ahmed Yassin. Death of the spiritual leader in an attack by the Israeli government; Mood at the funeral in Gaza; Protests and violence after the killing; Comments of Israeli Prime Minister Ariel Sharon, whose government authorized the attack; Sharon's approach to terrorism; Reactions to the attack, including condemnation by Arab and European officials; Comparison of Sheik Yassin to Osama bin Laden by Israeli officials; Hamas' commitment to Israel's destruction.