.Asia's Nikkei 225 mark drops 12.4% as world markets tremble over dangers to the United States economy The Associated PressGlobal inventory rout magnifies along with Japan's Nikkei experiencing worst someday loss and other Oriental markets plunging CNNStocks directed in Asia, roll in Europe as markets stress over U.S. economic condition after weaker than assumed projects mention CBS NewsStocks Set for Losses as Economy Concerns Strengthen: Markets Wrap Yahoo FinanceMarkets Worldwide Are Rattled by Anxieties of Slowing U.S. Development The Nyc Moments.