Mass graves of innocent people killed by the Pol Pot – Ieng Sary genocidal regime are unearthed after the liberation day on January 7, 1979 on the “Killing Field” Choeung Ek, about 17km to the South of Phnom Penh. Choeung Ek is the largest and most terrible mass grave among almost 100 mass graves throughout Cambodia (Source: VietnamPlus)