During the Cold War, East Germany’s secret police deployed 90,000 spies and 100,000 informers to keep tabs on 6 million people. Beyond the Berlin Wall, the CIA employed jazz ambassadors to penetrate the Iron Curtain with their secret countercultural weapon. Voice of America broadcasts captured the airways to beam jazzy democracy into the Soviet zone. Musicians and activists also risked their lives to smuggle contraband records across the border. Meanwhile, Stasi spies infiltrated clubs to track down subversive influences and harvest information on real or imagined enemies of the state.