Participant from Aksarka ride a sled during a reindeer race on the Reindeer Herders Day in the village Aksarka, center Priuralsky district of Yamalo-Nenets autonomous district, Russia, April 7, 2016.

A Muslim woman walks past a sign reading "Stop killing Muslims Army" on the walls in Kano, Nigeria, April. 8, 2016.

Northern Lights seen near the town of Salekhard, Yamalo-Nenets Autonomous Okrug, Russia, April 8, 2016.

Giant chinese panda Ai Bao eats bamboo at Everland amusement park, April 7, 2016, in Yongin, South Korea. South Korean amusement park Samsung Everlan introduced their new panda couple, a present given from China to South Korea. The area with the panda couple will be open for public on April 8.

A Chinese honor guard's face is covered by a red flag as he prepares for the arrival of Sri Lanka Prime Minister Ranil Wickremesinghe and Chinese Premier Li during a welcome ceremony outside the Great Hall of the People in Beijing, April 7, 2016.

A dancer waits backstage before performing during a dress rehearsal for the ballet “Giselle” at the Johannesburg Theatre, April 7, 2016, in Johannesburg. “Giselle,” choreographed by French ballet dancers Jean Coralli and Jules Perrot, is a romantic ballet in two acts that was first performed in Paris in 1841.

A boy looks through the border fence toward Macedonia during a protest against the closed border at the northern Greek border point of Idomeni, Greece, April 7, 2016.

A soldier carries mock weaponry for training during the visit of German Defence Minister Ursula von der Leyen (unseen) to the EUTM military training mission in Koulikoro, Mali, April 6, 2016.

A worker attaches the name tag of a Buddhist who made donation to a lantern, for the upcoming celebration of Buddha's birthday on May 14 at the Jogye temple in Seoul, South Korea, April 6, 2016. Many Buddhists visit the temple across the nation to celebrate the birthday and pray with their wishes.

A man rides an escalator in front of high rise buildings in the financial district Lujiazui in Shanghai, April 6, 2016.

A protester wears a mask during a demonstration by sex workers and supporters near the French National Assembly in Paris, April 6, 2016, as French lawmakers take part in a final debate on a bill that would make it illegal to pay for sex.

The Villarrica Volcano is seen at night in Chile, April 4, 2016.

Villanova Wildcats players Ryan Arcidiacono, left, Phil Booth and guard Mikal Bridges celebrate after defeating the North Carolina Tar Heels in the championship game of the 2016 NCAA Men's Final Four at NRG Stadium, April 4, 2016.

Pink flamingos stand in the water at the Ras al-Khor Wildlife Sanctuary on the outskirts of Dubai, April 5, 2016.

Labrador retriever dogs march with their handlers during the induction of 30 Labrador retriever dogs in the dog squad of Delhi Police, April 4, 2016, in New Delhi.

Pakistani residents cross a flooded street following heavy rain on the outskirts of Peshawar, April 4, 2016. At least 53 people were killed and 60 injured after heavy rain across northwest Pakistan and areas of Kashmir caused landslides and the roofs of dozens of homes to collapse, officials said.

A worker carries a tusk as he works with others to move the ivory stockpiles out of a strongroom to the container outside at a Kenya Wildlife Service headquarters in Nairobi, Kenya, April 4, 2016. KWS moved the ivory stockpiles out of their strongroom ahead of the ivory burning event on April 30, 2016 where 105 tons of ivory is set to be burned. This would be the single biggest haul ever to be burned.

Participants throw their pillows during the International Pillow Fight Day at Liberty Square, in Taipei, Taiwan, April 2, 2016.

Migrants and refugees gather to listen to Nadia Murad Basee Taha (not pictured), an Iraqi woman of the Yazidi faith who was abducted and held by the Islamic State for three months, at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016.

French President Francois Hollande stands near the flag-draped coffin of French writer and academic Alain Decaux during his funeral ceremony at Les Invalides in Paris, April 4, 2016. French writer and academic Alain Decaux died in Paris at the age of 90, his wife said on March 27, 2016.

A woman walks in a yard where tea leaves are dried at a tea company in Dening, China, April 2, 2016.

Devotees jostle to collect money showered on them by other devotees during a flag hoisting ceremony ahead of the annual festival marking the death anniversary of Sufi saint Moinuddin Chishti, in Ajmer, India, April 4, 2016.