Chinese military hacked into PentagonBy Demetri Sevastopulo in Washington and Richard McGregor in Beijing - The Chinese military hacked into a Pentagon computer network in June in the most successful cyber attack on the US defence department, say American officials. [...] The Pentagon is still investigating how much data was downloaded, but one person with knowledge of the attack said most of the information was probably “unclassified”. He said the event had forced officials to reconsider the kind of information they send over unsecured e-mail systems. [...] The National Security Council said the White House had created a team of experts to consider whether the administration needed to restrict the use of BlackBerries because of concerns about cyber espionage.