Chinese Web sites close amid tightening controls

(AP) -- Two more Web sites dedicated to social networking went offline in China on Tuesday amid tightening controls that have blocked Facebook, Twitter and other popular sites that offered many Chinese a rare taste of free ...

As Web communication shrinks, so do links

(AP) -- On the short-messaging service Twitter, space is at a premium: You've got 140 characters to make your point, and you probably don't want to waste half of it on a super-sized link to your latest YouTube obsession.

Social networking for terrorists

A new approach to analyzing social networks, reported in the current issue of the International Journal of Services Sciences, could help homeland security find the covert connections between the people behind terrorist attacks. ...

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