*In May 1951, two members of the [[Cambridge Five]] — [[Donald MacLean]], Second Secretary of the British Embassy in Washington, D.C., and [[Guy Burgess]] — defected to Moscow after it was discovered MacLean transmitted information on the atom bomb from the British Embassy to the Soviet Union during World War II. | *In May 1951, two members of the [[Cambridge Five]] — [[Donald MacLean]], Second Secretary of the British Embassy in Washington, D.C., and [[Guy Burgess]] — defected to Moscow after it was discovered MacLean transmitted information on the atom bomb from the British Embassy to the Soviet Union during World War II. |