A walk down the Khmer Rouge killing fields

Four top Khmer Rouge leaders were tried at Cambodia's UN-backed war crimes court for genocide and other atrocities during the Maoist group's reign from 1975 to 1979.

NDTV's Tejas Mehta travelled to witness the carnage of the killing fields of Cambodia. (Photo Courtesy: Tejas Mehta)

From 1975 to 1979, the Khmer Rouge ruled the country and its leadership are accused of one of the most horrendous genocides the world has ever witnessed. (Photo Courtesy: Tejas Mehta)

Two million people are estimated to have been killed through executions, forced labour and starvation in an era of tormenting anarchy. (Photo Courtesy: Tejas Mehta)

Pol Pot: He was Brother Number One. He died in 1998. (Photo Courtesy: Tejas Mehta)

Facing trial: Brother Number Two, Nuon Chea, ex Acting Prime Minister. He was the second most powerful after Pol Pot. He was in charge of the prisons. (Photo Courtesy: Tejas Mehta)

Facing trial: Khieu Samphan. Ex President, Head of the Khmer Rouge. (Photo Courtesy: Tejas Mehta)

Leng Sary, ex deputy Prime Minister. He was sentenced to death in absentia by a court created by Vietnamese invaders in 1979 and pardoned by Cambodia's then King Norodom Sihanouk in 1996. He says he cannot be retried for the same crime. (Photo Courtesy: Tejas Mehta)

Facing trial: Leng Thirith, ex Minister of Social Affairs.

A memorial for the victims of the massacre. (Photo Courtesy: Tejas Mehta)

Some of the weapons used for "liquidation". (Photo Courtesy: Tejas Mehta)

Fifteen kilometers from Phnom Pehn, the capital of Cambodia was Khmer Rouge's Extermination Camp at a placed called Choeung Ek. (Photo Courtesy: Tejas Mehta)

A reflection of the gruesome reality of that era. (Photo Courtesy: Tejas Mehta)

Even after several decades, the culprits haven't been brought to justice. (Photo Courtesy: Tejas Mehta)