A Palestinian girl stands near residential buildings that witnesses said were heavily damaged by Israeli shelling during a 50-day war last summer, in Beit Lahiya town in the northern Gaza Strip May 25, 2015. (Photo by Suhaib Salem/Reuters)

A member of an honor guard holds his rifle as the motorcade carrying U.S. President Barack Obama departs after he participated the Memorial Day observance at Arlington National Cemetery in Arlington, Virginia May 25, 2015. (Photo by Jonathan Ernst/Reuters)

An injured man covers his face after being hit by protesters who accused him of stealing, as riot police stand guard next to him during a demonstration to demand changes in the education system, in Santiago city, May 25, 2015. (Photo by Pablo Sanhueza/Reuters)

A German Airbus 310 MRTT arrives at Bodoe Main Air Station on the first day of the NATO Arctic Challenge Exercise May 25, 2015. (Photo by Thorbjoern Kjosvold/Reuters/Norwegian Armed Forces)

Rescued baby iguanas are pictured in a cardboard box, in an office of the Ministry of Environment in San Jose, May 25, 2015. Officers from the national police force of Costa Rica rescued 81 iguanas that had been confined to a box at a hotel in San Jose. It is presumed that the captive iguanas were the subject of an exotic pet smuggling, according to a press release issued by the Ministry of Public Security. The Ministry of the Environment rehabilitated the iguanas to a natural habitat today. (Photo by Juan Carlos Ulate/Reuters)

Rescued baby iguanas are pictured in a cardboard box, in an office of the Ministry of Environment in San Jose, May 25, 2015. (Photo by Juan Carlos Ulate/Reuters)

A rescued baby iguana is pictured in a cardboard box in an office of the Ministry of Environment in San Jose, May 25, 2015. (Photo by Juan Carlos Ulate/Reuters)

Rescued baby iguanas are pictured in a cardboard box, in an office of the Ministry of Environment in San Jose, May 25, 2015. (Photo by Juan Carlos Ulate/Reuters)

Rescued baby iguanas are seen in a cardboard box, in an office of the Ministry of Environment in San Jose, May 25, 2015. (Photo by Juan Carlos Ulate/Reuters)

Outtara Sandrine (L), 23, stands near a bathing child at her home in the Cocody Danga slum in Abidjan, Cote D'Ivoire May 25, 2015. (Photo by Luc Gnago/Reuters)

Emmanuel Gbalou, 10, lies on the ground while a worker repair electric cables in the Cocody Danga slum in Abidjan May 25, 2015. (Photo by Luc Gnago/Reuters)

Mariam Tchinda, 6, stands at her home in Cocody Danga slum in Abidjan May 25, 2015. (Photo by Luc Gnago/Reuters)

Nicole Gbalou, 31, arranges her clothes at her home in the Cocody Danga slum in Abidjan May 25, 2015. (Photo by Luc Gnago/Reuters)

Dancers dressed in prehispanic costumes perform during the Ceremony of the Ignition of the New Fire, at the ancient pyramids of Teotihuacan outside Mexico City May 25, 2015. The flame will be transferred to Toronto for the Pan-American games, which will be held there from July 10 to 26. (Photo by Henry Romero/Reuters)

A Mexican dressed in prehispanic costumes runs with a torch of the Pan American Games during the Ceremony of the Ignition of the New Fire, at the ancient pyramids of Teotihuacan outside Mexico City May 25, 2015. (Photo by Henry Romero/Reuters)

Dancers dressed in prehispanic costumes perform during the Ceremony of the Ignition of the New Fire, at the ancient pyramids of Teotihuacan outside Mexico City May 25, 2015. (Photo by Henry Romero/Reuters)

Tayanita and Ashokan, a pair of two-week-old baby beaver kits are held in the nursery of the Staten Island Zoo Monday, May 25, 2015, in the Staten Island borough of New York. The orphaned females were adopted by the zoo after their mother was killed in a trap, in Ithaca, leaving behind 6 babies. (Photo by Chad Rachman/New York Post)

Top Fuel driver Larry Dixon crosses the finish line to advance to the finals of the 2015 NHRA Kansas Nationals on Sunday May 24, 2015 at Heartland Park in Topeka, Kan. (Photo by Chris Neal/The Topeka Capital-Journal via AP Photo)

Funny Car drivers Jack Beckman, bottom, and Dale Warshem deploy their parashoots after racing in the semifinals of the 2015 NHRA Kansas Nationals on Sunday, May 24, 2015, at Heartland Park in Topeka, Kan. (Photo by Chris Neal/The Topeka Capital-Journal via AP Photo)

Funny Car drivers John Force, left, and Matt Hagen tear down the track during the semifinals of the 2015 NHRA Kansas Nationals on Sunday, May 24, 2015, at Heartland Park in Topeka, Kan. (Photo by Chris Neal/The Topeka Capital-Journal via AP Photo)

A participant wearing a Homer Simpson mask wallows in a puddle of mud during the so-called “Dirty Pig Festival” near Hergisdorf, Germany, 25 May 2015. With this custom the villagers want to dispel winter. The people of Hergisdorf use the annual event to banish the winter season. The puddle jumpers play the winter, participants dressed in white act as the summer. The participants in white use whips to force the puddle jumpers away, so that summer wins over winter. (Photo by Peter Endig/EPA)

Army Staff Sgt. Earl Granville of Arlington, Va., second from left, and former Army Spc. Jessica Red of Orlando, Fla., left, rest together in the grass outside Arlington National Cemetery in Arlington, Va., Monday, May 25, 2015, on Memorial Day. The two were part of a Operation Enduring Warrior backpacking event in which dozens of people walked from Harpers Ferry, W.Va., to Arlington National Cemetery. Americans observe Memorial Day this weekend to remember the men and women who died while serving in the U.S. military. (Photo by Andrew Harnik/AP Photo)

Model Jourdan Dunn poses for photographers upon arrival for the screening of the film The Little Prince at the 68th international film festival, Cannes, southern France, Friday, May 22, 2015. (Photo by Joel Ryan/Invision/AP Photo)

Actress Charlotte Vandermeersch poses for photographers upon arrival for the screening of the film The Little Prince at the 68th international film festival, Cannes, southern France, Friday, May 22, 2015. (Photo by Thibault Camus/AP Photo)

In this May 19, 2015 file photo, model Irina Shayk poses for photographers upon arrival for the screening of the film Sicario at the 68th international film festival, Cannes, southern France.Fashion highlights from the 68th Cannes international film festival. (Photo by Lionel Cironneau/AP Photo)

Children feed a giraffe at Pairi Daiza wildlife park, a zoo and botanical garden in Brugelette, Belgium, May 25, 2015. (Photo by Francois Lenoir/Reuters)

A Moldovan girl, her face painted, poses with her father behind a board during a street musical event in Chisinau, Moldova, Sunday, May 24, 2015. (Photo by Vadim Ghirda/AP Photo)

An Indian passenger takes a bath beside rail tracks on a hot summer day at a railway station in Jammu, India, Monday, May 25, 2015. Severe heat wave conditions continue to prevail at several places in northern India with temperatures reaching 48 degrees Celsius (118 degrees Fahrenheit). (Photo by Channi Anand/AP Photo)

In this handout photo provided by Insomniac, the 4th Annual Electric Daisy Carnival (EDC), New York returns to MetLife Stadium Memorial Day weekend, May 23-24, 2015. With its over-the-top production, amazing fireworks displays, larger than life art installations, full-scale carnival rides and more, the show transformed MetLife Stadium into another world as summer officially kicks off. (Photo by Insomniac via Getty Images)

In this handout photo provided by Insomniac, the 4th Annual Electric Daisy Carnival (EDC), New York returns to MetLife Stadium Memorial Day weekend, May 23-24, 2015. (Photo by Insomniac via Getty Images)

In this handout photo provided by Insomniac, the 4th Annual Electric Daisy Carnival (EDC), New York returns to MetLife Stadium Memorial Day weekend, May 23-24, 2015. (Photo by Insomniac via Getty Images)

In this handout photo provided by Insomniac, the 4th Annual Electric Daisy Carnival (EDC), New York returns to MetLife Stadium Memorial Day weekend, May 23-24, 2015. (Photo by Insomniac via Getty Images)

In this handout photo provided by Insomniac, the 4th Annual Electric Daisy Carnival (EDC), New York returns to MetLife Stadium Memorial Day weekend, May 23-24, 2015. (Photo by Insomniac via Getty Images)

A picture made available on 25 May 2015 shows Nemisix from Munich during the Wave Gothic Meeting 2015 in Leipzig, Germany, 23 May 2015. Organisers expect around 20,000 visitors to attend the festival over the Pentecost weekend. The event runs until 25 May. (Photo by Jan Woitas/EPA)

A young Victoria crowned pigeon (Goura victoria) with its mother at their enclosure in Wroclaw's Zoo in Wroclaw, Poland, 25 May 2015. The Victoria crowned pigeon is part of a genus of three unique very large, ground-dwelling pigeons native to the New Guinea region. Its name commemorates the British monarch Queen Victoria. (Photo by Maciej Kulczynski/EPA)

Visitors to the inaugural International Consumer Electronics Show (CES) Asia look at a model showing Intel's 3D printed Spider Dress which is embedded with sensors to detect the proximity of people around her in Shanghai, China Monday May 25, 2015. (Photo by Chinatopix Via AP Photo)

Emirati visitors take photos at the Space Museum during the launch of the UAE Space Agency strategic plan in Abu Dhabi, United Arab Emirates, Monday, May 25, 2015. The agency on Monday laid out a strategic framework for a newly created space agency that aims to integrate various arms of the Gulf federation's burgeoning space industry. The announcement comes less than three weeks after the Dubai-based team behind a 2020 mission to Mars announced that its probe will circle the planet studying its atmosphere, including changes over time and how surface features such as volcanoes, deserts and canyons affect it. (Photo by Kamran Jebreili/AP Photo)

Residents stand outside their homes as damaged cars are seen after a tornado hit the town of Ciudad Acuna, state of Coahuila, May 25, 2015. At least 10 people died on Monday morning after a tornado hit Ciudad Acuna, a Mexican city on the border with Texas, Mayor Evaristo Lenin Perez said. (Photo by Ramiro Gomez/Reuters)

Florida head coach Kevin O'Sullivan and ESPN reporter Laura Rutledge are dunked with water after Florida beat Vanderbilt 7-3 during the Southeastern Conference NCAA college baseball tournament championship game at the Hoover Met, Sunday, May 24, 2015, in Hoover, Ala. (Photo by Butch Dill/AP Photo)

Indian vendors selling onions rest on a sidewalk under the shade of a tree on a hot summer day in Hyderabad, India, Monday, May 25, 2015. Hundreds of people have died since mid-April in a heat wave sweeping two southeast Indian states, Andhra Pradesh and Telangana, officials said Saturday. (Photo by Mahesh Kumar A./AP Photo)