He said had spoken to American MIA officials about this .
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 .
politician said had spoken to American MIA officials about this .
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 .