Khmer Rouge
Cambodian fine arts school students take part in a performance to mark the annual 'Day of Anger' at the Choeung Ek killing fields memorial in Phnom Penh on May 20, 2012. Cambodians have demanded harsh punishement for ex-Khmer Rouge leaders as they marked the annual 'Day of Anger' with a re-enactment of crimes by the regime at a notorious killing fields.