The AP has reported that Senate Judiciary Committee chairman Sen. Patrick Leahy (D-Vt.) expressed skepticism over the FBI’s contention that Bruce Ivins acted alone in the 2001 anthrax attacks. During a hearing on the matter in front of his committee today, Leahy, who was a target of the deadly attacks, told FBI Director Robert Mueller that he doesn’t think Ivins was the only person involved. “I believe there are others involved, either as accessories before…