GRAND RAPIDS, Mich. - President Bush (news - web sites) and Sen. John Kerry (news - web sites) charged into a sharp final round of argument Saturday over which one can best fight global terrorism, the import of their debate underscored by Osama bin Laden (news - web sites)'s sudden reappearance on tape at "a time of great consequence," in the words of the president. "The person that sits in the Oval Office will determine the outcome of the war on terror and the economy," Bush told supporters in Grand Rapids, Mich., after directing his national security aides to take...