A trader works on the floor of the New York Stock Exchange on Thursday, Aug. 4, 2011 in New York. Fears about the global economy led to the biggest panic in financial markets since the 2008 financial ... more 
A trader works on the floor of the New York Stock Exchange on Thursday, Aug. 4, 2011 in New York. Fears about the global economy led to the biggest panic in financial markets since the 2008 financial crisis. The Dow plunged nearly 513 points Thursday, its biggest point decline since Oct. 22, 2008. (AP Photo/Jin Lee) less 
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Associated Press | Photo By Jin Lee
Thu, Aug 4, 2011 4:52 PM EDT