Which city was divided by a wall that became the most recognizable symbol of the Cold War?

Which Soviet double agent worked for British intelligence while secretly passing information to Moscow for decades?

The U-2 spy plane incident of 1960 occurred when an American reconnaissance aircraft was shot down over which country?

Which intelligence agency was created in 1947 to coordinate American espionage and covert operations during the Cold War?

What was the name of the Soviet intelligence agency that operated during most of the Cold War until 1991?

Which American couple was executed in 1953 for passing atomic secrets to the Soviet Union?

The Venona Project was a secret American program that did what during and after World War II?

Which city became the center of Cold War espionage activity because it was occupied by all four major Allied powers?

What was the primary purpose of the East German Stasi?

Which tunnel dug beneath Berlin in the 1950s allowed Western intelligence to tap Soviet communication lines until it was discovered?