How Hacker Sleuths Found Zhang Changhe in Trail From Myrtle Beach to China [Getty Images]

Servers blink at the offices of Dell SecureWorks, a unit of Dell Inc., in Myrtle Beach, South Carolina, U.S., Friday, Jan. 18, 2013. The computers in the office mostly run programs Joe Stewart, director of malware research Dell SecureWorks, wrote himself to dissect and sort the malware and figure out whether he’s dealing with variations of old code or something entirely new. Photographer: Stephen Morton/Bloomberg via Getty Images

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