U.S. conventions bring river of cash to host cities   Kidnap suspect `Rockefeller' gives NBC interview   IOC: Despite questions, no proof China cheated   Oil holds above $121 on tension with Russia   Buffett, others say high U.S. debt levels pose risks   Verizon, Google close to mobile search deal: report   Crews rescue 2 teens trapped in Wash. snow field   US subprime crisis: all aboard the foreclosure bus   Officials: Threat sent to McCain's Colorado office   Mike Leigh: portraying women as "not just male fantasies"   Texas man gets life for child sex club conviction   Student killed in shooting at Tenn. school   AP NewsAlert   Outgoing Qantas boss says merger inevitable   LEAD: Noda decides against running for president of opposition DPJ+   LEAD: Gov't to draft extra budget, Ibuki rules out bond issuance+   Harvard reclaims top spot in latest US News list   U.S. aircraft carrier George Washington leaves San Diego for Yokosuka+   Obama says he's made his choice for running mate   Main events scheduled for Saturday, Aug. 23+