.Japan's Nikkei 225 mark drops 12.4% as world markets shiver over risks to the United States economic situation The Associated PressGlobal stock thrashing magnifies along with Japan's Nikkei suffering worst someday reduction and other Eastern markets diving CNNStocks directed in Asia, topple in Europe as markets fret over U.S. economic condition after weak than expected work state CBS NewsStocks Prepare for Reductions as Economic Climate Worries Strengthen: Markets Cover Yahoo FinanceMarkets Around the World Are Actually Discomposed through Concerns of Slowing USA Development The New York City Moments.