Article Photos: How a phony tweet and computer trades sank stocks 1/1

Trader Christopher Lotito, center, works on the floor of the New York Stock Exchange Wednesday, April 24, 2013. No sooner did a phony Associated Press report of explosions at the White House appear on Twitter on Tuesday than investors started dumping stocks, eventually unloading $134 billion worth. Turns out, some investors are not only gullible, they’re impossibly fast stock traders. (AP Photo/Richard Drew)