Spy case to open can of FBI worms Probe into dealings of Los Angeles socialite could expose bureau tactics, lax operations Twelve years ago, a team of U.S. counterintelligence operatives flew into frigid southern Manchuria to assess Chinese spying on American diplomats. Instead, the U.S. agents came to believe their own team was tracked by China's Ministry of State Security every step of their mission, which is still classified today. The first clue was an odd elevator encounter in remote northeast China, an FBI agent bumping into a California nuclear-weapons scientist suspected of stealing neutron bomb secrets. Counterintelligence agents are...