Pentagon keeps wary watch as troops blog

There are two sides to the military's foray into the freewheeling world of the interactive Web. At the highest echelons of the Pentagon, civilian officials and four-star generals are newly hailing the power of social networking to make members of the American military more empathetic, entice recruits and shape public opinion on the war. The Web, however, is a big place. And the many thousands of troops who use blogs, Facebook, Twitter and other social media sites to communicate with the outside world are not always in tune with the Pentagon's official voice.

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