The Origins of FBI CounterintelligenceAs the world prepared for war in the 1930s, the United States discovered that it faced the real threat of foreign spies stealing military and industrial secrets and that it had no established means to combat them. Into that breach stepped J. Edgar Hoover and the FBI. Although the FBI's expanded role in World War II has been well documented, few have examined the crucial period before Pearl Harbor when the Bureau's powers secretly expanded to face the