The British double agent Dusko Popov, who reputedly inspired Ian Fleming’s creation of James Bond, was approached by the Germans to become their spy. Popov did so, but reported everything he did to the British. When the Germans sent Popov to set up a large spy ring in the U.S., he was asked to gather some very provocative information for the Japanese. The Japanese request, called the "Japanese questionnaire," involved a lot of extremely specific information about Hawaii and Pearl Harbor. British Intelligence and Popov came to the conclusion in August of 1941 that the Japanese were preparing an invasion...