According to U.S. intelligence officials, Russia had advance warning that accused spy FBI agent Robert Hannsen was about to be arrested – prompting fears that other, more important, moles still exist at the highest levels of the U.S. government. Several senior U.S. intelligence officials confirmed that Russian SVR agents became "active" nearly two weeks prior to Hannsen's arrest. "I had a conversation with TASS Washington, D.C., Bureau Chief Shitov nearly a week after Hannsen was arrested," noted one source, who requested that his name be withheld. "He was nervous and clearly upset. At one point he became downright nasty." Several...