Cambodia's bloody past – Cambodian and international journalists watch a live video feed showing the verdicts in the trial of former Khmer Rouge leader "Brother Number Two," Nuon Chea, and former Khmer Rouge head of state Khieu Samphan, August 7, 2014.
Cambodia's bloody past – A Cambodian man Khieu Samphan on a television during the trial at the Extraordinary Chamber in the Courts of Cambodia (ECCC) in Phnom Penh on August 7. He and Nuon Chea were found guilty of crimes against humanity and sentenced to life in prison.
Cambodia's bloody past – Known as Brother Number Two, Nuon Chea was considered Khmer Rouge leader Pol Pot's right hand man. This is an image from court in 2011.
Cambodia's bloody past – As the former head of state for the Khmer Rouge, Khieu Samphan occupied a number of key roles as the government tortured, starved and killed its people.
Cambodia's bloody past – This undated photo, which may have been taken in 1989, shows Pol Pot, the former leader of the Khmer Rouge. He was under house arrest when he died in 1998 and never faced charges for the slaughter under his reign.
Cambodia's bloody past – At least 1.7 million people were killed under the Khmer Rouge's brutal regime, which controlled Cambodia from 1975 to 1979. This photo shows open mass graves in 1979.
Cambodia's bloody past – Khmer Rouge guerilla soldiers wearing black uniforms drive into Phnom Penh in April 1975, as Cambodia falls under the control of the Khmer Rouge.
Cambodia's bloody past – A woman cries next to a dead body in April 1975 in Phnom Penh, after the Khmer Rouge enter the Cambodian capital and establish the government of Democratic Kampuchea (DK).
Cambodia's bloody past – Historical, undated photo of Nuon Chea. He held a number of positions during the regime's rule, including a short stint as acting prime minister.
Cambodia's bloody past – Historical, undated photo of Khieu Samphan. During his trial, Khieu Samphan expressed remorse, claiming he was unaware of the full extent of the atrocities. He became the public face of the Khmer Rouge as it sought international credibility after its fall.
Cambodia's bloody past – A Cambodian man sits in Choeung Ek Killing Fields near a tree that was used to beat children to death during the Khmer Rouge regime on August 6, 2014 in Phnom Penh, Cambodia.
Cambodia's bloody past – A Cambodian man stands by a wall of photographs of prisoners of the Khmer Rouge regime in one of the rooms of Tuol Sleng prison, also known as S-21, on August 6 in Phnom Penh.
Cambodia's bloody past – Cambodian citizen Sam Vishna looks at a collection of skulls that make up a map of Cambodia at Tuol Sleng Prison Museum in Phnom Penh in 1998.
Cambodia's bloody past – Cambodian Buddhist monks bless victims' skulls at the Choeung Ek Killing Fields memorial in Phnom Penh on April 17, 2008.
Cambodia's bloody past – Cambodian Sao Phen prepares skulls and bones of victims of the Khmer Rouge inside a stupa in Kandal province in 2009.
Cambodia's bloody past – A Cambodian woman looks at portraits of victims of the Khmer Rouge at the Tuol Sleng genocide museum in Phnom Penh on November 17, 2011.