FILE - The submarine USS Greeneville is escorted to the submarine base at Pearl Harbor, in this Feb. 10, 2001, file photo. A high concentration of important military commands and facilities on the

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FILE - The submarine USS Greeneville is escorted to the submarine base at Pearl Harbor, in this Feb. 10, 2001, file photo. A high concentration of important military commands and facilities on the island mean there's a great deal of information in Hawaii that potential adversaries want to know. (AP Photo/Ronen Zilberman) less 

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Associated Press
Wed, Apr 3, 2013 3:54 PM EDT