In a 2002 interview , the Cambodia politician Pen Sovan reported hearing about American POWs from his guards , during his imprisonment in Vietnam .
In a 2002 interview , the Cambodia politician Pen Sovan believed that some had been taken by the Soviet Union .
In a 2002 interview , the Cambodia politician Pen Sovan reported hearing about American POWs from his guards , during his imprisonment in Vietnam , and believed that some had been taken by the Soviet Union .