Mistrust and the Hunt for Spies Among Chinese Americans

For days after his FBI interrogation, Wei Su wondered: Where had the microphone been?

The agents had played him a scratchy recording of a conversation he’d had with a friend at a restaurant in Eatontown, N.J. Both men found it strange when a pot of hot tea arrived at their table without their having ordered it, but only later did Su, an award-winning scientist for the U.S. Army’s Intelligence and Information Warfare Directorate, form a hypothesis. He thinks the teapot was bugged.