Most of the 131 people Pfc. Amber Thill lists as friends on her MySpace.com page serve in the military. Some, like Thill's husband, are deployed to Iraq; others are serving in Afghanistan. MySpace, the 20-year-old Thill says, is how most of us communicate." This online link between troops serving overseas and their friends and families was interrupted Monday when the Defense Department announced that it had cut off access to MySpace, YouTube and 11 other popular file-sharing and networking Web sites on the Pentagon's 5 million computers and 15,000 networks. The new policy, which military officials say is intended to reduce the amount of traffic snagging the Defense Department's overburdened worldwide network, comes on the heels of an Army regulation last month enforcing new, strict rules on soldier bloggers. The new regulation for the first time created a blanket ban on sites many troops use to share news, photos, video and audio with their family and friends. Military officials said they blocked the Web sites because they took up too much bandwidth. Military bloggers say the new rules are part of a concerted effort to suppress online publications by troops in the field. On many bases in Iraq and Afghanistan, Defense Department computers and networks are the only ones available to the troops. "These blogs, these posts on MySpace were the last tenuous connection that an everyday American ... has to what the American military is, who the troops are," said retired paratrooper Matthew Burden, who runs the military blog www.blackfive.net. "This last tenuous connection will get severed by those regulations." It will definitely decrease the amount of communications back home," said Burden.

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