A tourist views photos of  former Khmer Rouge prisoners at the Tuol Sleng genocide museum, formerly the regime's notorious S-21 prison, in Phnom Penh, Cambodia, Wednesday, Aug. 12, 2009. Under the command of Kaing Guek Eav, better known as Duch, who headed the prison, up to 16,000 people were tortured and later taken away to be killed during the Khmer Rouge's 1975-1979 rule. The chief of the Khmer Rouge's main torture center, being tried by a U.N.-backed tribunal on genocide charges, asked the Cambodian people Wednesday to give him "the harshest punishment." AP Photo logo AP Photo 3 months ago

A tourist views photos of former Khmer Rouge prisoners at the Tuol Sleng genocide museum, formerly the regime's notorious S-21 prison, in Phnom Penh, Cambodia, Wednesday, Aug. 12, 2009. Under the command of Kaing Guek Eav, better known as Duch, who headed the prison, up to 16,000 people were tortured and later taken away to be killed during the Khmer Rouge's 1975-1979 rule. The chief of the Khmer Rouge's main torture center, being tried by a U.N.-backed tribunal on genocide charges, asked the Cambodian people Wednesday to give him "the harshest punishment."