A North Korean boy plays with a toy pistol as elderly people gather around a gazebo, Sunday, May 3, 2015, at the Moranbong, or Moran Hill, in Pyongyang, North Korea. (Photo by Wong Maye-E/AP Photo)

Peyton Moses, 18 months, clings to her mom, Heather Blackgoat, from Kirtland, N.M., before the Tiny Tot Girls competition in the 32nd annual Gathering of Nations in Albuquerque N.M., Saturday, April 25, 2015. (Photo by Mark Holm/AP Photo)

Students work with Special Olympians at Ready, Set, Gold! Day sponsored by Samsung at Trinity Street Elementary on Saturday, May 2, 2015 in Los Angeles. (Photo by Matt Sayles/Invision for Samsung/AP Images)

Pashmina Ghaley, 10, left, and her friend Ramina Bhujel, 10, pal around in the destroyed village of Balua, near the epicenter of Saturday's massive earthquake, in the Gorkha District of Nepal, Thursday, April 30, 2015. (Photo by Wally Santana/AP Photo)

In this Saturday, April 4, 2015 photo, Vietnamese-American Jillian Nguyen, 3, stands with others during their baptism into the Catholic faith, at Saint Helena Catholic Church in Philadelphia. (Photo by Matt Rourke/AP Photo)

A girl drinks water from a faucet amid an acute shortage of clean drinking water in Sanaa, April 24, 2015. (Photo by Mohamed al-Sayaghi/Reuters)

In this Monday, April 13, 2015 photo, an Afghan child laborer pushes a cart, at the Afghanistan-Iranian border point on the outskirts of Islam Qala in Herat province, west of Kabul, Afghanistan. (Photo by Massoud Hossaini/AP Photo)

In this Monday, April 13, 2015 photo, an Afghan deportee child rests on the ground in a reception tent, at the Afghanistan-Iranian border point on the outskirts of Islam Qala in Herat province, west of Kabul, Afghanistan. Around 25,000 Afghans a month are deported from Iran at Islam Qala, nicknamed “Zero Point” along with another 30,000 a month who cross returning home voluntarily, a sign of Tehran's efforts to control the huge numbers of Afghans who flock to their neighbor. Iran has long been an outlet for Afghans, either searching for work to escape poverty or seeking refuge from their country's chronic wars and instability. (Photo by Massoud Hossaini/AP Photo)

A child plays with a broom at a shelter for victims of immigrant attacks in Johannesburg, Wednesday, April 22, 2015. (Photo by Denis Farrell/AP Photo)

Children play on a boat in the water outside their homes in the Belen neighborhood of Iquitos, Peru on April 19, 2015. This impoverished Peruvian Amazon community, nicknamed “Venice of the Jungle”, lives half the year on the water, with canoes replacing motorcycle taxis as the most popular form of transport. (Photo by Rodrigo Abd/AP Photo)

An injured boy waits inside a field hospital after what activists said were airstrikes and shelling by forces loyal to Syria's President Bashar al-Assad in the Douma neighborhood of Damascus April 22, 2015. (Photo by Mohammed Badra/Reuters)

In this June 3, 2008 file photo, Tianna Swisher, a student at Liberty Valley Elementary School in Danville, Pa., attempts to drink from the water fountain at Montour Preserve near Washingtonville, Pa., during an outdoor field trip. (Photo by Bill Hughes/Press-Enterprise via AP Photo)

A child does a handstand outside a tent at a shelter for victims of immigrant attacks in Johannesburg, Wednesday, April 22, 2015. (Photo by Denis Farrell/AP Photo)

Winnipeg Jets fans Corie, Erica and Chantelle Naugle are dressed in white – some more than others – as they arrive for Game 4 of a first-round NHL hockey playoff series between the Jets and the Anaheim Ducks, Wednesday, April 22, 2015, in Winnipeg, Manitoba. (Photo by John Woods/The Canadian Press via AP Photo)

A trained beluga whale kisses a girl on the cheek during a performance at the Beijing Aquarium in Beijing, April 23, 2015. (Photo by Reuters/Stringer)

An Italian naval officer interacts with a child amongst rescued migrants onboard the Italian Navy vessel Bettica as they arrive in the Sicilian harbour of Augusta on April 22, 2015. (Photo by Alberto Pizzoli/AFP Photo)

Syrian immigrant Mohamed, 12, looks out of the window of a police bus after arriving at the Armed Forces of Malta Maritime Squadron base at Haywharf in Valletta's Marsamxett Harbour in this October 12, 2013 file photo. (Photo by Darrin Zammit Lupi/Reuters)

Children play during the Day of Clown festival in Almaty, Kazakhstan, April 24, 2015. (Photo by Shamil Zhumatov/Reuters)

A child experiencing shock is seen next to a Red Cross paramedic outside the jail during a clash of rival groups in the prison of Cancun, Mexico April 26, 2015. (Photo by Victor Ruiz Garcia/Reuters)

An Afghan girl plays a tambourine outside her house in Kabul, Afghanistan April 27, 2015. (Photo by Mohammad Ismail/Reuters)

In this January 29, 2015 file photo, children play under the water that they manage to spill over from a water tank, to cool off from the summer heat, at the Alemao Complex slum in Rio de Janeiro, Brazil. (Photo by Leo Correa/AP Photo)

A Palestinian girl plays in front of her family's house that witnesses said was destroyed by Israeli shelling during a 50-day war last summer, in the east of Gaza City April 27, 2015. (Photo by Mohammed Salem/Reuters)

Guarani Indian boys stand in the village of Pyau at Jaragua district, in Sao Paulo April 27, 2015. More than 700 Guarani Indians live in three villages in the Jaragua district in Sao Paulo. The National Indian Foundation (FUNAI) has recognised 521 hectares (5.21 square km) of this area as indigenous territory, making it the smallest indigenous reserve in Brazil. Members of the Guarani community have now established a new village outside the demarcation and are being threatened with an eviction through a court order. (Photo by Nacho Doce/Reuters)

A two-year-old boy, whom local media identified by the pseudonym Xiaofeng, reacts as he practises with his prosthetic legs at a hospital in Wuhan, Hubei province, China, April 24, 2015. Xiaofeng lost his legs in a traffic accident and was installed with prosthesis earlier this month. (Photo by Reuters/Stringer)

Boys take part in a coin game contest during a celebration of religious patron Nuestro Senor Jesucristo in Quezon city, Philippines May 3, 2015. The winner of the contest is the one who gets the coin inside the mouth first without touching the coin. (Photo by Erik De Castro/Reuters)

A six-year-old acrobat performs on the opening of a tourist festival in Bozhou, Anhui province, China May 3, 2015. (Photo by Reuters/China Daily)

A girl rescued by Nigerian soldiers from Boko Haram extremists at Sambisa Forest lines up with others for food upon their arrival at a refugee camp in Yola, Nigeria Saturday, May 2, 2015. They were among a group of 275 people rescued from the Islamic extremists, the first to arrive at the refugee camp Saturday after a three-day journey to safety. (Photo by Sunday Alamba/AP Photo)

A boy pushes a wooden cart with his siblings on it at a market in Manila on April 24, 2015. (Photo by Noel Celis/AFP Photo)

A young girl holding a baby takes a cool drink from a water spigot in the destroyed village of Balua, near the epicenter of Saturday's massive earthquake, in the Gorkha District of Nepal, Thursday, April 30, 2015. (Photo by Wally Santana/AP Photo)

A Nepalese infant is given a vaccination in Lapsiphedi, near Kathmandu, Nepal, Monday, May 4, 2015. A campaign's underway in Nepal to immunize half a million children against measles and rubella in the wake of the earthquake. (Photo by Bernat Amangue/AP Photo)

Women and children rescued by Nigeria soldiers from Islamist extremists at Sambisa forest arrive at a camp in Yola Nigeria, Saturday May. 2, 2015. The first group of nearly 300 Nigerian girls and women released from Boko Haram were brought by the military to the safety of a refugee camp in the country's northeast Saturday evening. More than 677 females have been released this week, as the Nigerian military continues its campaign to push the Islamic extremists out of their last remaining strongholds in the Sambisa Forest. (Photo by Sunday Alamba/AP Photo)

A Pakistani family waits for more food donations at a distribution center in the Barri Imam shrine in Islamabad, Pakistan, Thursday, April 23, 2015. People who visit shrines and pray that their wishes are fulfilled usually offer food to be distributed to the poor. Hundreds of poor families receive free food daily at the shrine. (Photo by B. K. Bangash/AP Photo)

Children rescued by Nigerian soldiers from Boko Haram extremists at Sambisa Forest rest at a refugee camp in Yola, Nigeria Monday, May 4, 2015. Even with the crackle of gunfire signaling rescuers were near, the horrors did not end: Boko Haram fighters stoned captives to death, some girls and women were crushed by an armored car and three died when a land mine exploded as they walked to freedom. (Photo by Sunday Alamba/AP Photo)