The Pentagon is reviewing its policy concerning the access by military personnel to social networking Web sites such as Facebook and Twitter, a spokesman said Tuesday. The review follows a Marine Corps ban on accessing such sites on its computers, due to security concerns. The ban announced Monday only applies to Marine Corps networks and computers, allowing Marines to access the sites on their own computers or at Internet cafes. A policy review for the entire Department of Defense should be complete by the end of September, Pentagon spokesman Bryan Whitman said.

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