BEIRUT, Lebanon - The Lebanese prime minister rejected a U.N. cease-fire plan backed by President Bush, demanding on Monday that Israel immediately pull out from southern Lebanon even before a peacekeeping force arrives to act as a buffer between Hezbollah and the Jewish state. Prime Minister Fuad Saniora's stand, delivered in a tearful speech to Arab foreign ministers, came on a day in which 49 Lebanese were killed — one of the deadliest days for Lebanese in nearly four weeks of fighting. His Cabinet, which includes two Hezbollah ministers, voted unanimously to send 15,000 troops to stand between Israel and...