This Feb. 8, 2012 photo shows a mural at Facebook headquarters in Menlo Park, Calif. Intruders recently infiltrated the systems running the world's largest online social network but did not steal any ... more 
This Feb. 8, 2012 photo shows a mural at Facebook headquarters in Menlo Park, Calif. Intruders recently infiltrated the systems running the world's largest online social network but did not steal any sensitive information about Facebook's more than 1 billion users, according to a blog posting Friday, Feb. 15, 2013, by the company's security team. (AP Photo/Paul Sakuma) less 
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Associated Press | Photo By Paul Sakuma
Fri, Feb 15, 2013 7:55 PM EST