A Cambodian woman burns incense sticks as she prays in front of a stupa containing hundreds of human skulls and bones of victims in Khmer Rouge regime, at Choeung Ek memorial on the outskirts of Phnom Penh, Cambodia, Friday, April 17, 2015. Cambodian main opposition Cambodia National Rescue Party leader Sam Rainsy on Friday led a Buddhist ceremony marking the 40th anniversary of fall of Phnom Penh to Khmer Rouge. (Photo by Heng Sinith/AP Photo)

Skulls and bones of more than 8,000 victims of the Khmer Rouge regime are displayed at Choeung Ek, a “Killing Fields” site located on the outskirts of Phnom Penh April 17, 2015. (Photo by Samrang Pring/Reuters)

Buddhist monks attend a Buddhist ceremony at Choeung Ek, a “Killing Fields” site located on the outskirts of Phnom Penh, April 17, 2015. (Photo by Samrang Pring/Reuters)

Cambodians pray in front of a stupa containing hundreds of human skulls and bones of victims in Khmer Rouge regime, at Choeung Ek memorial on the outskirts of Phnom Penh, Cambodia, Friday, April 17, 2015. (Photo by Heng Sinith/AP Photo)

Men look at skulls and bones of more than 8,000 victims of the Khmer Rouge regime during a Buddhist ceremony at Choeung Ek, a “Killing Fields” site located on the outskirts of Phnom Penh, April 17, 2015. (Photo by Samrang Pring/Reuters)

A Cambodian woman prays for her relatives who died during the Khmer Rouge regime during a ceremony at a victim memorial stupa in Kampot province, Cambodia, 15 April 2015. Cambodian relatives of the Khmer Rouge victims hold the ceremony to pray for the victims who died during the cruel rule of the Khmer Rouge regime from 1975-1979. Some two million Cambodians are estimated to have died by starvation and forced labor or were killed in politically justified executions during the Khmer Rouge regime. (Photo by Mak Remissa/EPA)

A woman stands in front of the stupa containing hundreds of human skulls and bones of victims in Khmer Rouge regime, at Choeung Ek memorial on the outskirts of Phnom Penh, Cambodia, Friday, April 17, 2015. (Photo by Heng Sinith/AP Photo)

Indian Sikhs offer prayers at a Sikh temple on Baisakhi, in New Delhi, India, Tuesday, April 14, 2015. Baisakhi, the harvest festival celebrated in the Punjab region also coincides with other festivals celebrated on the first day of Indian calendar month Vaisakh. The festival has special significance for Sikhs since it marks the day in 1699, when their tenth Guru Gobind Singh organized the order of the Khalsa, a collective body of initiated Sikhs. (Photo by Manish Swarup/AP Photo)

Indian Sikhs prepare food for devotees at a Sikh temple on Baisakhi, in New Delhi, India, Tuesday, April 14, 2015. (Photo by Manish Swarup/AP Photo)

Indian Sikhs prepare food for devotees at a Sikh temple on Baisakhi, in New Delhi, India, Tuesday, April 14, 2015. (Photo by Manish Swarup/AP Photo)

Indian Sikhs offer prayers at a Sikh temple on Baisakhi, in New Delhi, India, Tuesday, April 14, 2015. (Photo by Manish Swarup/AP Photo)

A child poses for a photograph in front of performers after a parade to celebrate the Songkran festival in Hong Kong on April 12, 2015. The Songkran festival marks the start of the traditional new year in Thailand which begins on April 13. (Photo by Dale de la Rey/AFP Photo)

Performers take part in a parade to celebrate the Songkran festival in Hong Kong on April 12, 2015. (Photo by Dale de la Rey/AFP Photo)

Performers take part in a parade to celebrate the Songkran festival in Hong Kong on April 12, 2015. (Photo by Dale de la Rey/AFP Photo)

Members of the Thai community perform music to celebrate the Songkran festival in Hong Kong on April 12, 2015. (Photo by Dale de la Rey/AFP Photo)

Children take part in a parade to celebrate the Songkran festival in Hong Kong on April 12, 2015. (Photo by Dale de la Rey/AFP Photo)

A Hindu devotee watches as he is nailed to a cross during the annual Shiva Gajan religious festival in Batanal village, east of Kolkata, April 14, 2015. (Photo by Rupak De Chowdhuri/Reuters)

A devotee dressed as Hindu goddess Kali performs during a ritual as part of the annual Shiva Gajan religious festival at Pratapgarh, on the outskirts of the northeastern Indian city of Agartala, April 14, 2015. Hundreds of faithful devotees offer sacrifices and perform acts of devotion during the festival in the hopes of winning the favour of Hindu god Shiva and ensuring the fulfillment of their wishes, and also to mark the end of the Bengali calendar year. (Photo by Jayanta Dey/Reuters)

A Hindu devotee reacts as he is nailed to a cross during the annual Shiva Gajan religious festival in Batanal village, east of Kolkata, April 14, 2015. (Photo by Rupak De Chowdhuri/Reuters)

The tongue of a Hindu devotee is pieced with a metal skewer during the annual Shiva Gajan religious festival in Batanal village, east of Kolkata, April 14, 2015. (Photo by Rupak De Chowdhuri/Reuters)

The arm of a devotee is pierced with nails during the annual Shiva Gajan religious festival in Batanal village, east of Kolkata, April 14, 2015. (Photo by Rupak De Chowdhuri/Reuters)

A Hindu devotee is seen nailed to a cross during the annual Shiva Gajan religious festival in Batanal village, east of Kolkata, April 14, 2015. (Photo by Rupak De Chowdhuri/Reuters)

A Hindu devotee reacts as a nail is pierced through his arm skin during the annual Shiva Gajan religious festival in Batanal village, east of Kolkata, April 14, 2015. (Photo by Rupak De Chowdhuri/Reuters)

A Hindu priest (C) blesses ritually bound devotees lying on the ground during a ritual as part of the annual Shiva Gajan religious festival at Pratapgarh, on the outskirts of Agartala, April 14, 2015. (Photo by Jayanta Dey/Reuters)

Spectators gather to watch a Hindu devotee, tied with a rope on a pole, hover around in circles during Shiva Gajan festival or Charak on the last day of Bengali calendar in Kolkata, India, Tuesday, April 14, 2015. Faithful Hindu devotees offer various such rituals each year in the hope of winning the favor of Hindu god Shiva and ensuring the fulfillment of their wishes. (Photo by Bikas Das/AP Photo)

Devotees perform rituals and offer prayers at a temple of Hindu God Muruga on “Puthandu” in Chennai, India, Tuesday, April 14, 2015. Puthandu, or Tamil New Year, is celebrated by Tamils living across the world. (Photo by Arun Sankar A./AP Photo)

A Hindu devotee offers a prayer before swinging on a rope tied to a pole during Shiva Gajan festival or Charak on the last day of Bengali calendar in Kolkata, India, Tuesday, April 14, 2015. Faithful Hindu devotees offer various such rituals each year in the hope of winning the favor of Hindu god Shiva and ensuring the fulfillment of their wishes. (Photo by Bikas Das/AP Photo)

Villagers walk on burning coal laid out in front of the temple of their village goddess on the last day of the Jhamu Yatra festival at Mendhasal village on the outskirts of Bhubaneswar, India, Tuesday, April 14, 2015. Faithful Hindu devotees offer various such rituals each year in the hope of winning the favor of their local deities. (Photo by Biswaranjan Rout/AP Photo)

A Hindu devotee lies on a bed of nails as he is carried past spectators during the ritual of Shiva Gajan at Pratapgarh village in Agartala, the capital of northeastern state of Tripura on April 14, 2015. Devotees believe that by enduring the pain, Shiva, the Hindu god of destruction, will grant their prayers. Thousands took part in the month-long festival which culminates with the worship of Shiva on the auspicious day of Chaitra Sankranti, the last day of the Bengali calendar year. (Photo by Arindam Dey/AFP Photo)

A Hindu man is being painted with red color he takes part in a festival called Lal Kach (Red Glass) during the last day of the Bangla month in Munshigonj, Dhaka, Bangladesh, 13 April 2015. The festival is well known for the local community for more than hundred years. The Hindu youth and men paint themselves with red color and attend a procession holding swords as they show power against evil and welcome the Bengali New Year 1422 on 14 April 2015. (Photo by Abir Abdullah/EPA)

A Sikh man and his son pray before taking a holy dip in the “Sarowar”, or sacred pond, of the Golden Temple, the holiest shrines of the Sikhs, on the occasion of the Visakhi festival, in Amritsar, India, 14 April 2015. On Visakhi Day of 1699 A.D. Guru Gobind Singh ji, the tenth Sikh Master organized the Sikhs under one order called the “Khalsa Panth”. The Visakhi festival also marks the beginning of the Sikh New Year. (Photo by Raminder Pal Singh/EPA)

A Nepalese devotee hangs on a rope tied to a “lingo” a long wooden pole symbolizing a phallus, erected a day earlier with the belief that it will bring happiness and good harvest, during the Bisket festival at Bhaktapur, Tuesday, April 14, 2015. (Photo by Niranjan Shrestha/AP Photo)

Nepalese devotees take down the “lingo” a long wooden pole symbolizing a phallus, erected a day earlier with the belief that it will bring happiness and good harvest, during the Bisket festival at Bhaktapur, Tuesday, April 14, 2015. During the festival, also regarded as Nepalese New Year, images of Bhairava and his consort Bhadrakali are enshrined in two large chariots and pulled to an open square after which rituals and festivities are performed. (Photo by Niranjan Shrestha/AP Photo)

Devotees are silhouetted as they gather under the “lingo” a long wooden pole representing a phallus, before pulling it down during the Bisket festival at Bhaktapur April 14, 2015. The festival, which runs for more than a week and coincides with the Nepalese New Year, involves devotees offering prayers and the pulling of two chariots, one bearing the idol of God Bhairab and the other with the idol of Goddess Bhadrakali, around the ancient city of Bhaktapur. Devotees participate in the festival with the belief that they will be blessed with good health and fortune, and with a bountiful harvest for the coming year. (Photo by Navesh Chitrakar/Reuters)

Women return from a temple after offering prayers during the Sindoor Jatra vermillion powder festival at Thimi, in Bhaktapur, April 15, 2015. (Photo by Navesh Chitrakar/Reuters)

Devotees celebrate Sindoor Jatra vermillion powder festival at Thimi, in Bhaktapur April 15, 2015. The festival is celebrated by singing, dancing, playing traditional instruments, carrying chariots of various deities around the town, offering prayers and throwing vermilion powder over each other to mark the Nepalese New Year and the beginning of the spring season in the country. (Photo by Navesh Chitrakar/Reuters)

Devotees celebrate Sindoor Jatra vermillion powder festival at Thimi, in Bhaktapur April 15, 2015. (Photo by Navesh Chitrakar/Reuters)

Devotees throw vermillion powder on one another to celebrate the Nepali New Year, also known as Sindoor Jatra, at Thimi, in Bhaktapur April 15, 2015. (Photo by Navesh Chitrakar/Reuters)

Devotees play traditional musical instruments while celebrating Sindoor Jatra vermillion powder festival at Thimi, in Bhaktapur April 15, 2015. (Photo by Navesh Chitrakar/Reuters)

The head of a sacrificed chicken is seen on an offering plate during the Sindoor Jatra vermillion powder festival at Thimi, in Bhaktapur April 15, 2015. (Photo by Navesh Chitrakar/Reuters)

A woman observes people celebrating Sindoor Jatra vermillion powder festival at Thimi, in Bhaktapur April 15, 2015. (Photo by Navesh Chitrakar/Reuters)

A devotee is smeared with a vermillion powder while celebrating Sindoor Jatra vermillion powder festival at Thimi, in Bhaktapur April 15, 2015. (Photo by Navesh Chitrakar/Reuters)

A devotee smeared in vermillion powder smiles as he holds a “Chirag”, traditional lamp, while celebrating the Sindoor Jatra vermillion powder festival at Thimi, in Bhaktapur April 15, 2015. (Photo by Navesh Chitrakar/Reuters)

A devotee smeared in vermillion powder is pictured while celebrating Sindoor Jatra vermillion powder festival at Thimi, in Bhaktapur April 15, 2015. (Photo by Navesh Chitrakar/Reuters)

A devotee smeared in vermillion powder lights a “Chirag”, traditional lamp, while celebrating the Sindoor Jatra vermillion powder festival at Thimi, in Bhaktapur April 15, 2015. (Photo by Navesh Chitrakar/Reuters)

Nepalese devotees gather to watch Sindur Jatra festival in Thimi, outskirts of Kathmandu, Nepal, Wednesday, April 15, 2015. Sindur Jatra, or Vemillion Powder Festival, is celebrated to welcome the advent of spring and the New Year. (Photo by Niranjan Shrestha/AP Photo)

A Nepalese man covered in vermilion powder lights Chirag, a traditional lamp during Sindur Jatra festival in Thimi, outskirts of Kathmandu, Nepal, Wednesday, April 15, 2015. (Photo by Niranjan Shrestha/AP Photo)

A man with coloured powder on his face during the Bisket Jatra Festival in Thimi, on the outskirts of Kathmandu, Nepal, 15 April 2015. The Bisket festival marks Nepali New Year 2072 and celebrates peace and harmony in the country. (Photo by Narendra Shrestha/EPA)

Nepalese people watch a concert organized ahead of the Sindur Jatra festival in Bhaktapur, Nepal, Tuesday, April 14, 2015. The festival is celebrated to welcome the advent of spring and the New Year. (Photo by Niranjan Shrestha/AP Photo)

A Nepalese man, right, smears vermillion powder on his friend during Sindur Jatra festival in Thimi, outskirts of Kathmandu, Nepal, Wednesday, April 15, 2015. (Photo by Niranjan Shrestha/AP Photo)

Nepalese devotees, covered in color vermilion powder, carry a palanquin with idols of Hindu deities during Sindur Jatra festival in Thimi, outskirts of Kathmandu, Nepal, Wednesday, April 15, 2015. (Photo by Niranjan Shrestha/AP Photo)

A devotee holds incense sticks while celebrating the Sindoor Jatra Festival on April 15, 2015 in Thimi, Nepal. Sindoor Jatra Festival is celebrated each year in Thimi, on the outskirts of Kathmandu, to welcome the Nepali New Year and celebrate the coming of spring. During the Festival, devotees are smeared with vermillion powder and 30 chariots containing the images of several gods and goddesses are carrying by the devotees around the town, while others sing, dance and play musical instruments. (Photo by Omar Havana/Getty Images)

A group of devotees carry torches symbolising bringing in the spring sunshine that will nourish the crops during the Sindoor Jatra Festival on April 15, 2015 in Thimi, Nepal. (Photo by Omar Havana/Getty Images)

A Nepalese devotee holds a brass tray with the head of a chicken that was just sacrificed during Sindur Jatra festival in Thimi, outskirts of Kathmandu, Nepal, Wednesday, April 15, 2015. (Photo by Niranjan Shrestha/AP Photo)

A Nepalese man smears vermillion powder on his friend during Sindur Jatra festival in Thimi, outskirts of Kathmandu, Nepal, Wednesday, April 15, 2015. (Photo by Niranjan Shrestha/AP Photo)

Nepalese people sing and dance to traditional music with coloured powder on their faces during the Bisket Jatra Festival in Thimi, on the outskirts of Kathmandu, Nepal, 15 April 2015. (Photo by Narendra Shrestha/EPA)

Nepalese devotees play traditional drums during Sindur Jatra festival in Thimi, outskirts of Kathmandu, Nepal, Wednesday, April 15, 2015. (Photo by Niranjan Shrestha/AP Photo)

Two devotees with their faces covered in vermillion powder celebrate the new year during the Sindoor Jatra Festival on April 15, 2015 in Thimi, Nepal. (Photo by Omar Havana/Getty Images)