1. Pol Pot - Cambodia

2. Genocide is what Pol Pot and his Khmer Rouge party did in the latter half of the 1970s Among the first evidence of the horror, this "killing field" was uncovered in 1980. The death toll: –certainly more than a million –perhaps two million

3. Phnom Penh High School

4. One of the worst groups to massacre was the Khmer Rouge secret police They turned Phnom Penh high school into its headquarters, renamed S-21. Thousands were tortured and executed in former classrooms.

6. The school has now been refashioned into the Tuol Sleng Museum of Genocide. Thousands of pictures of Khmer Rouge victims hang on its walls People were duly photographed, then tortured and killed.

7. The name Khmer Rouge, which means "Red Khmers," was given to a left-wing Cambodian faction in the 1950s.Khmer Rouge Led by Pol Pot, it gained control of Cambodia in 1975. Then began one of the century's greatest massacres.

8. Pol Pot declared "Year Zero" and began a radical program to create an idealized agrarian communist society. He crushed social institutions such as banking and religion and emptied cities of their inhabitants.

9. Intellectuals and anyone else seen as standing in the way of the new social order were mercilessly killed. Many of those who escaped execution died from overwork and starvation.

10. The Khmer Rouge was ousted from power by a Vietnamese invasion in 1979.