MEXICO CITY -- Former President Bill Clinton said Wednesday the United States needs to involve more countries in rebuilding Iraq and that the United Nations should not be weakened in the process. Clinton spoke at a political conference in Mexico City, where he also met with President Vicente Fox at the presidential residence. "What's done is done," Clinton said, referring to the war in Iraq. "We cannot let this be a precedent for weakening the U.N.," he said. "We have to have honest inspections for chemical and biological weapons, and we need to have a sensible attempt to involve the...