Jim Nicholson was one of the CIA's top veteran case officers. By day he taught spycraft at the CIA's clandestine training center, The Farm. By night he was a minivan-driving single father racing home to have dinner with his kids. But Nicholson led a double life. For more than two years, he had met covertly with agents of Russia's foreign intelligence service and turned over troves of classified documents. In 1997 Nicholson became the highest-ranking CIA officer ever convicted of espionage.