Don Jackson, director of intelligence at SecureWorks which manages security information systems for corporations world wide, is pictured in his office Friday July 2, 2010, in Atlanta. Analysts at the company worked on the investigation into last year's cyber attack that took down websites in the U.S. and South Korea. (AP Photo/John Amis)
Read the article: U.S. largely ruling out North Korea in 2009 cyberattacks
