Lead:  In 1954 the Central Intelligence Agency dug a 1400 foot tunnel under the border of East Berlin to spy on Soviet military messages. It was an engineering triumph, but there was one hitch. The Soviets knew it was there.

Tag: "A Moment In Time" with Dan Roberts.

Content: George Blake was a member of the British Secret Intelligence Service. During the early days of the Korean War he was captured by the North Koreans and held for three years. Sometime during his prison stay he went over to the other side. In 1954, when the spy tunnel was first discussed by the CIA and its British counterpart, MI6, Blake was in the meeting, took extensive notes, and passed the sketches and drawings to his KGB control officer within two days.

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