Fingers of blame are being pointed in every direction as Wall Street and world financial markets react to history's first downgrade of America's credit rating. Standard and Poor's is taking its own licks for bad mathematics and because other ratings firms are keeping the US at AAA. Is President Obama at fault? What about Tea Party Republicans and European economies? Why are US Treasuries still the safest place to be? What's next for local governments and individuals with home and auto loans?