FBI Says Hackers Accessed Gov't Computers

Activist hackers linked to the collective known as Anonymous have secretly accessed U.S. government computers in multiple agencies and stolen sensitive information in a campaign that began almost a year ago, the FBI warned. The hackers exploited a flaw in Adobe Systems Inc.'s software to launch a rash of electronic break-ins that began last December, then left "back doors" to return to many of the machines as recently as last month, the Federal Bureau of Investigation said in a memo seen by Reuters.