Khieu Samphan (; born 28 July 1931) is a Cambodian former communist politician and economist who was the chairman of the state presidium of Democratic Kampuchea (Cambodia) from 1976 until 1979. As such, he served as Cambodia's head of state and was one of the most powerful officials in the Khmer Rouge movement, although Pol Pot remained the General Secretary (highest official) in the party. Wikipedia
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