A Cambodian flag is reflected in a glass display as the skulls of the victims of the Khmer Rouge are seen at a memorial stupa during a Remembrance Day ceremony in Choeung Ek, a "Killing Fields" site located 17km (11 miles) south of Phnom Penh, May 20, 2008. Thousands of Cambodians including 500 monks gathered at the site to remember those who perished during the radical communist group's 1975-79 regime.REUTERS/Chor Sokunthea (CAMBODIA)
A Cambodian villager prays at a memorial stupa filled with the skulls of thousands of victims of the Khmer Rouge on display at Choeung Ek, a "Killing Fields" site located on the outskirts of Phnom Penh, during a "Remembrance Day" ceremony May 20, 2008. Thousands of Cambodians including 500 monks gathered at the site to remember those who perished during the radical communist group's 1975-79 regime.REUTERS/Chor Sokunthea (CAMBODIA)
A Cambodian woman cries during a performance based on the Khmer Rouge regime at a Remembrance Day ceremony in Choeung Ek, a "Killing Fields" site located 17km (11 miles) south of Phnom Penh, May 20, 2008. Thousands of Cambodians including 500 monks gathered at the site to remember those who perished during the radical communist group's 1975-79 regime.REUTERS/Chor Sokunthea (CAMBODIA)
Cambodian villagers light incense at a memorial stupa filled with the skulls of thousands of victims of the Khmer Rouge on display at Choeung Ek, a "Killing Fields" site located on the outskirts of Phnom Penh, during a "Remembrance Day" ceremony May 20, 2008. Thousands of Cambodians including 500 monks gathered at the site to remember those who perished during the radical communist group's 1975-79 regime.REUTERS/Chor Sokunthea (CAMBODIA)
Cambodian villagers pray at a memorial stupa filled with the skulls of thousands of victims of the Khmer Rouge on display at Choeung Ek, a "Killing Fields" site located on the outskirts of Phnom Penh, during a "Remembrance Day" ceremony May 20, 2008. Thousands of Cambodians including 500 monks gathered at the site to remember those who perished during the radical communist group's 1975-79 regime.REUTERS/Chor Sokunthea (CAMBODIA)
A wreath is placed in front of a memorial stupa filled with the skulls of thousands of victims of the Khmer Rouge on display at Choeung Ek, a "Killing Fields" site located on the outskirts of Phnom Penh, during a "Remembrance Day" ceremony May 20, 2008. Thousands of Cambodians including 500 monks gathered at the site to remember those who perished during the radical communist group's 1975-79 regime.REUTERS/Chor Sokunthea (CAMBODIA)
Cambodian Buddhist monks watch a performance based on the Khmer Rouge regime during a Remembrance Day ceremony in Choeung Ek, a "Killing Fields" site located 17km (11 miles) south of Phnom Penh, May 20, 2008. Thousands of Cambodians including 500 monks gathered at the site to remember those who perished during the radical communist group's 1975-79 regime.REUTERS/Chor Sokunthea (CAMBODIA)
Cambodian Buddhist monks watch a performance based on the Khmer Rouge regime during a Remembrance Day ceremony in Choeung Ek, a "Killing Fields" site located 17km (11 miles) south of Phnom Penh, May 20, 2008. Thousands of Cambodians including 500 monks gathered at the site to remember those who perished during the radical communist group's 1975-79 regime.REUTERS/Chor Sokunthea (CAMBODIA)