WASHINGTON - Somewhere in the United States live a few former spies from the communist government of Czechoslovakia, which passed into history in 1989. When officials of the new Czech Republic tried to recall them, they simply refused. They had grown accustomed to their lives in America, they said, and did not want to abandon their families. The Czech government decided to leave them alone. The spies were sleeper agents who had never been activated. The communist government, a hard-line treaty ally of the Soviet Union, had planned to order them to duty in the event of a crisis or...