O'Cha Commune chief from opposition party Cambodia National Rescue Party (CNRP) Sin Rozeth, smiles at her office after an interview with Reuters in Battambang province, Cambodia, October 11, 2017. Picture taken on October 11, 2017. REUTERS/Samrang Pring 

O'Cha Commune chief from opposition party Cambodia National Rescue Party (CNRP) Sin Chan Pov Rozet, gestures during an interview with Reuters in Battambang province, Cambodia, October 11, 2017. Picture taken on October 11, 2017. REUTERS/Samrang Pring 

A man uses a smartphone to take photo of a sign of opposition party Cambodia National Rescue Party (CNRP) along a street to Battambang Province, Cambodia, October 11, 2017. Picture taken on October 11, 2017. REUTERS/Samrang Pring 

O'Cha Commune chief from opposition party Cambodia National Rescue Party (CNRP) Sin Chan Pov Rozet, smiles during an interview with Reuters in Battambang province, Cambodia, October 11, 2017. Picture taken on October 11, 2017. REUTERS/Samrang Pring 

O'Cha Commune chief from opposition party Cambodia National Rescue Party (CNRP) Sin Rozeth, smiles during an interview with Reuters at her office in Battambang province, Cambodia, October 11, 2017. Picture taken on October 11, 2017. REUTERS/Samrang Pring 

O'Cha Commune chief from opposition party Cambodia National Rescue Party (CNRP) Sin Rozeth, walks out of her office after an interview with Reuters in Battambang province, Cambodia, October 11, 2017. Picture taken on October 11, 2017. REUTERS/Samrang Pring 

Battambang police chief Brigadier General Sar Theth poses with notes from a seized haul of $7.16 million in counterfeit hundred-dollar bills, in Battambang September 30, 2014. Cambodian police seized the fake notes on September 19 near the border with Thailand, the largest seizure of fake U.S. notes in Southeast Asia for about a decade and the biggest ever in Cambodia. Picture taken September 30, 2014. To match CAMBODIA-CRIME/COUNTERFEIT REUTERS/Andrew RC Marshall (CAMBODIA - Tags: CRIME LAW BUSINESS) 

Notes from a seized haul of $7.16 million in counterfeit hundred-dollar bills are pictured in Battambang September 30, 2014. Cambodian police seized the fake notes on September 19 near the border with Thailand, the largest seizure of fake U.S. notes in Southeast Asia for about a decade and the biggest ever in Cambodia. Picture taken September 30, 2014. To match CAMBODIA-CRIME/COUNTERFEIT REUTERS/Andrew RC Marshall (CAMBODIA - Tags: CRIME LAW BUSINESS) 

Police and court officials examine notes from a seized haul of $7.16 million in counterfeit hundred-dollar bills, in Battambang September 30, 2014. Cambodian police seized the fake notes on September 19 near the border with Thailand, the largest seizure of fake U.S. notes in Southeast Asia for about a decade and the biggest ever in Cambodia. Picture taken September 30, 2014. To match CAMBODIA-CRIME/COUNTERFEIT REUTERS/Andrew RC Marshall (CAMBODIA - Tags: CRIME LAW BUSINESS) 

Police and court officials examine notes from a seized haul of $7.16 million in counterfeit hundred-dollar bills, in Battambang September 30, 2014. Cambodian police seized the fake notes on September 19 near the border with Thailand, the largest seizure of fake U.S. notes in Southeast Asia for about a decade and the biggest ever in Cambodia. Picture taken September 30, 2014. To match CAMBODIA-CRIME/COUNTERFEIT REUTERS/Andrew RC Marshall (CAMBODIA - Tags: CRIME LAW BUSINESS) 

A court official examines notes from a seized haul of $7.16 million in counterfeit hundred-dollar bills, in Battambang September 30, 2014. Cambodian police seized the fake notes on September 19 near the border with Thailand, the largest seizure of fake U.S. notes in Southeast Asia for about a decade and the biggest ever in Cambodia. Picture taken September 30, 2014. To match CAMBODIA-CRIME/COUNTERFEIT REUTERS/Andrew RC Marshall (CAMBODIA - Tags: CRIME LAW BUSINESS) 

Va Young, a 50-year-old man, makes bamboo floors in western Cambodia's Battambang province February 15, 2009. Young, who makes under $5 per-day, lost his leg to a landmine in 1990 while fighting with the Khmer Rouge, he said. On February 17, Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Put Koon, a 45-year-old Cambodian man, stands outside his hut in western Cambodia's Battambang province February 15, 2009. Koon lost his leg to a landmine in 1991 while fighting with the Khmer Rouge, he said. On February 17, Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Put Koon, a 45-year-old Cambodian man, walks past his cattle on his farmland in western Cambodia's Battambang province February 15, 2009. Koon lost his leg to a landmine in 1991 while fighting with the Khmer Rouge, he said. On February 17, Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Va Young, a 50-year-old man, makes bamboo floors for huts in western Cambodia's Battambang province February 15, 2009. Young, who makes under $5 per-day, lost his leg to a landmine in 1990 while fighting with the Khmer Rouge, he said. On February 17, Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Va Young, a 50-year-old man, trims bamboo for making huts in western Cambodia's Battambang province February 15, 2009. Young, who makes under $5 per day, lost his leg to a landmine in 1990 while fighting with the Khmer Rouge, he said. On February 17, Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Put Koon, a 45-year-old Cambodian man, stands nearby his cattle on his farmland in western Cambodia's Battambang province February 15, 2009. Koon lost his leg to a landmine in 1991 while fighting with the Khmer Rouge, he said. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Put Koon, a 45-year-old Cambodian man, walks on his farmland in western Cambodia's Battambang province February 15, 2009. Koon lost his leg to a landmine in 1991 while fighting with the Khmer Rouge, he said. On February 17, Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A woman stands outside a disco in Cambodia's western city Battambang on February 14, 2009. REUTERS/Adrees Latif (CAMBODIA) 

A couple talk inside a hall after a wedding reception in Cambodia's western city Battambang on February 14, 2009. REUTERS/Adrees Latif (CAMBODIA) 

A man cuts cassava root on a farm in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 14, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A woman stands in a field of cassava roots in Pailin, a former Khmer Rouge strong hold, in western Cambodia's Battambang province on February 14, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A man preparing to plant corn prepares small sacks of dirt in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province on February 14, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A Buddhist nun looks out of a temple in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 14, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A man polishes gems in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 14, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A man walks his buffaloes in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 14, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A man bathes in a river near Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 14, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Gems waiting to be polished are seen sitting atop a can in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 14, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Men sway cut cassava root to be dried at a farm in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 14, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A Muslim boy poses for a portrait in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 13, 2009. A landmine exploded nearby a day earlier, killing a family of three, local said. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

School children walk past Cambodian soldiers searching for landmines on the outskirts of Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 13, 2009. A landmine exploded nearby a day earlier, killing a family of three, local said. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Cambodian soldiers search for landmines on the outskirts of Pailin, a former Khmer Rouge strong hold, in western Cambodia's Battambang province February 13, 2009. A landmine exploded nearby a day earlier, killing a family of three, local said. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Cambodian soldiers search for landmines on the outskirts of Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province on February 13, 2009. A landmine exploded nearby a day earlier, killing a family of three, local said. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Cambodian soldiers search for landmines on the outskirts of Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 13, 2009. A landmine exploded nearby a day earlier, killing a family of three, local said. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A Cambodian soldier holds a metal detector as he and others look for landmines on the outskirts of Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province on February 13, 2009. A landmine exploded nearby a day earlier, killing a family of three, local said. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Men watch boxing in a coffee shop in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province on February 13, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A boy rests in his father's arms as he shops in a market in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 13, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Children carry drinking water down a dirt road to their home in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 13, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A boy picks fruit off a tree as smoke rises from burning fields in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 13, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Men move bags of corn from a truck entrapped in sand on the outskirts of Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province on February 13, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A sign warning of mines is placed on a road as Cambodian soldiers search for mines on the outskirts of Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 13, 2009. A landmine exploded nearby a day earlier, killing a family of three, local said. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A woman sells vegetables in the central market in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 13, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Cambodian soldiers look for mines on a dirt road on the outskirts of Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 13, 2009. A landmine exploded nearby a day earlier, killing a family of three, local said. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Kon Pun, a 49-year-old former Khmer Rouge solider, sits on the front porch of his home in Pailin, a former stronghold for the Khmer Rouge, in western Cambodia's Battambang province February 13, 2009. Pun said he lost each leg to a different landmine while serving under the Khmer Rouge regime. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

Jayo Tan, a 55-year-old former Khmer Rouge solider, purchases rice at the central market in Pailin, a former strong hold for the Khmer Rouge, in western Cambodia's Battambang province on February 13, 2009. Tan said he lost his right eye in 1990 to artillery fire on Wat Phnom Sampeau. On February 17, Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA) 

A landmine victim stands in the cafeteria of a school in Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

A landmine victim rests his foot on a ball in the courtyard of a school for landmine and polio victims in Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

Ratana, a 12-year-old Cambodian boy who lost an eye, arm and two fingers to a landmine, poses in front of a chalkboard in a school for landmine and polio victims in Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

A man wearing prosthetics sweeps near a man on crutches in the courtyard of a school for landmine and polio victims in Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

Land mines and unexploded ordnance sit displayed in a land-mine field in the outskirts of Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

A woman holding a metal-detector is silhouetted in a land-mine field in the outskirts of Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

A man holds a metal-detector in a land-mine field in the outskirts of Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

A man surveys an area after detonating a land-mine in the outskirts of Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

Personnel prepare to detonate a land-mine in a field in the outskirts of Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

A red sign warning of mines rests in a land-mine field in the outskirts of Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

A woman carries a metal detector in an area being de-mined in the outskirts of Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

A man prepares to trim grass in an area to be de-mined in the outskirts of Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

Unexploded ordnance sit displayed in a land-mine field in the outskirts of Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

A woman rehearses de-mining techniques in a land mine field in the outskirts of Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

A woman holds a metal detector while clearing a mine field in the outskirts of Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA)