MIAMI — President Bush insisted anew today that any Mideast cease-fire be conditioned on a wider agreement and said he would look to the United Nations to act to establish "a long-lasting peace, one that is sustainable." As Israel cut short a halt in bombing and launched new strikes in southern Lebanon, Bush spelled out a series of what he called "clear objectives" to accompany a halt in the fighting. "Iran must end its financial support and supply of weapons to terrorist groups like Hezbollah. Syria must end its support for terror and respect the sovereignty of Lebanon," Bush said...