Hundreds of thousands of Palestinians chanting “revenge, revenge” flooded Gaza’s streets Monday to bury assassinated Hamas founder Sheik Ahmed Yassin, as militants pledged unprecedented retaliation — including threats against the United States. U.N. Secretary-General Kofi Annan and many world leaders condemned Monday’s killing of Yassin, the most prominent Palestinian targeted by Israel in 3 1/2 years of fighting. The Bush administration said it was “deeply troubled” by the attack and that it had no advance warning. “We will get revenge for every drop of blood that spilled,” said Salman Bdeiri, a Hamas supporter crying near the mosque where Yassin prayed shortly before being killed by an Israeli airstrike. Full Story