A woman tries a swing in front of a screen featuring New York scenes during the new Air France Exhibition called “Air France, France is in the Air” in New York June 25, 2014. (Photo by Timothy A. Clary/AFP Photo)

Participants perform stunts in front of St. Isaac's Cathedral during a festival of youth street culture in St. Petersburg, Russia, on June 28, 2014. (Photo by Alexander Demianchuk/Reuters)

A Bru tribal woman enjoys a “Maktu”, a traditional smoking pipe at the Naisingpara Bru refugee Relief camp in Tripura state, India, 16 June 2014. The repatriation of the Mizoram Bru refugees will be carried out on 17 June 2014 from six Bru refugee camps who are now lodging in transit camps in neighbouring Tripura state, since they fled Mizoram in 1997 following ethnic violence. A total of 494 Bru families have been verified and they are confirmed as the genuine residents of Mizoram state. They would also be provided rice free of cost for one year. The people of the Bru community were displaced from Mizoram following ethnic conflicts with the Mizos in 1997 and since then they were sheltered in six camps at Kanchanpur in North Tripura district of Tripura state. (Photo by EPA/STR)

Visitors look at the “Dark Matter” installation by Troika (2014) at the Art Unlimited exhibition at the Art Basel fair in Basel June 17, 2014. Founded by gallerists in 1970, the Art Basel is an international art show which is held annually in Basel, Hong Kong and Miami Beach. (Photo by Denis Balibouse/Reuters)

A demonstrator skates in front of a burning barricade in the Marginal Pinheiros area during a protest against the 2014 World Cup, in Sao Paulo June 19, 2014. (Photo by Nacho Doce/Reuters)

A boy walks towards the ocean on the 10th annual International Surfing Day in Hermosa Beach, California June 20, 2014. (Photo by Lucy Nicholson/Reuters)

Racegoers attend the first day of the Royal Ascot horse racing festival at Ascot, southern England June 17, 2014. (Photo by Toby Melville/Reuters)

Children, who fled from violence in Mosul, play during sunset inside the Khazer refugee camp on the outskirts of Arbil, in Iraq's Kurdistan region, June 27, 2014. Grand Ayatollah Ali Sistani, the most influential Shi'ite cleric in Iraq, called on the country's leaders on Friday to choose a prime minister within the next four days, a dramatic political intervention that could hasten the end of Nuri al-Maliki's eight year rule. (Photo by Ahmed Jadallah/Reuters)

Revellers dressed in Aztec costume celebrate the summer solstice on Salisbury Plain in southern England June 21, 2014. Stonehenge is a celebrated venue of festivities during the summer solstice – the longest day of the year in the northern hemisphere – and it attracts thousands of revellers, spiritualists and tourists. Druids, a pagan religious order dating back to Celtic Britain, believe Stonehenge was a centre of spiritualism more than 2,000 years ago. (Photo by Kieran Doherty/Reuters)

A festival-goer holds up a smiley face as the sun sets in front of the Other Stage at Worthy Farm in Somerset, during the Glastonbury Festival June 27, 2014. (Photo by Cathal McNaughton/Reuters)

Pro-Russian fighters stand guard at a check point in the village of Karlivka near Donetsk, eastern Ukraine, Wednesday, June 18, 2014, during a handover of the bodies of Ukrainian troops who died in a plane shot down near Luhansk. The two sides managed to arrange a brief truce Wednesday evening in the eastern town of Karlivka to allow pro-Russian forces to hand over the bodies of 49 Ukrainian troops who died when the separatists shot down a transport plane bound for the airport in Luhansk last weekend. (Photo by Evgeniy Maloletka/AP Photo)

Palestinians sit by the Mediterranean Sea at the port in Gaza City, Sunday, June 22, 2014. The sea and its solo port are the prime summer escape for the 1.8 million residents of the Gaza Strip, which is cut off from the world by the near-total closure of Rafah crossing point, Gaza's main gate to the outside world. (Photo by Hatem Moussa/AP Photo)

Models are silhouetted during the presentation of Ermanno Scervino men's Spring-Summer 2015 collection, part of the Milan Fashion Week, unveiled in Milan, Italy, Tuesday, June 24, 2014. (Photo by Giuseppe Aresu/AP Photo)

The evening sun shines behind ears of barley on a field in Duesseldorf, Germany, on June 22, 2014. (Photo by Martin Gerten/European Pressphoto Agency)

A Malaysian Muslim woman waits for the announcement to mark the start of the fasting month of Ramadan in Putrajaya, outside Kuala Lumpur, Malaysia, on June 27, 2014. (Photo by Shamshahrin Shamsudin/European Pressphoto Agency)

Young men play beach football as the sunsets on Ipanema beach on June 25, 2014 in Rio de Janeiro, Brazil. (Photo by Richard Heathcote/Getty Images)

Indian couple silhouetted against the sky enjoy a horse ride along the Arabian Sea coast in Mumbai, India, 25 June 2014. The India Meteorological Department (IMD) has predicted below average rains for the monsoon season which runs from June to September and that accounts for about 80 percent of India's annual rainfall. (Photo by Divyakant Solanki/EPA)

An Afghan youth pushes a wheelbarrow during sunset in Mazar-i-Sharif on April 22, 2014. Afghanistan remains at war, with civilians among the hardest hit as the Taliban wage an increasingly bloody insurgency against the government. (Photo by Farshad Usyan/AFP Photo)

Members of the Islamist movement Hamas stand behind a barrier erected to seal off the site of an Israeli air strike in Gaza City, on June 19, 2014. Israeli war planes staged several raids on Gaza for the sixth night running after a day in which militants fired five rockets over the border, one of which damaged a house in southern Israel, the army said. (Photo by Mohammed Abed/AFP Photo)

Spectators are silhoutted as they watch the Islamic Fashion Festival during 2014 Malaysia International Fashion Week in Kuala Lumpur on June 20, 2014. (Photo by Manan Vatsyayana/AFP Photo)

Katerina Stefandi of Greece competes in the pole vault during the Adidas Grand Prix at Icahn Stadium on Randalls Island on June 14, 2014 in New York City. (Photo by Al Bello/Getty Images)

An Argentinian street performer is watched by spectators, in front of city's landmark, the White Tower, at sunset, on the seaside promenade in the northern Greek city of Thessaloniki, Tuesday, June 24, 2014. (Photo by Nikolas Giakoumidis/AP Photo)

A family of seagulls are silhouetted on the rooftops of Peckham as the sun goes down on June 21, 2014 in London, England. The UK is enjoying a hot start to the summer and forecasters have predicted that the first week of Wimbledon will be dry and fine. (Photo by Mary Turner/Getty Images)

Sri Lankan children playing with soap bubbles are silhouetted against the setting Sun in Colombo, Sri Lanka, Tuesday, June 24, 2014. (Photo by Eranga Jayawardena/AP Photo)

Dustin Brown of Germany serves during his Gentlemen's Doubles first round match with Jan-Lennard Struff against Ken Skupski and Neal Skupski of Great Britain on day three of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on June 25, 2014 in London, England. (Photo by Dan Kitwood/Getty Images)

Some of the thousands of platinum mineworkers report for work at Lonmin, Anglo American Platinum, mine in Marikana, South Africa, Wednesday, June 25, 2014, following the resolution of the five-month strike in the sector. A mine spokesperson said the returning workers would have to undergo medicals and retraining before they could resume their jobs. (Photo by Denis Farrell/AP Photo)

People celebrate the summer solstice at the Kokino megalithic observatory, near the city of Kumanovo June 21, 2014. The 3,800-year-old observatory was discovered in 2001 in the northwestern town of Kumanovo, north from Skopje, and is ranked as the fourth oldest observatory in the world, according to NASA. (Photo by Ognen Teofilovsk/Reuters)

Dancers at Arcadia rehearse at Worthy Farm in Pilton on the eve of the first day of the 2014 Glastonbury Festival on June 24, 2014 in Glastonbury, England. Gates opened today at the Somerset dairy farm that plays host to one of the largest music festivals in the world. Tickets to the event, which is now in its 44th year, sold out in minutes even before any of the headline acts had been confirmed. The festival, which started in 1970 when several hundred hippies paid £1, now attracts more than 175,000 people. (Photo by Matt Cardy/Getty Images)

Indian youths play football at Juhu beach in Mumbai on June 24, 2014. (Photo by Punit Paranjpe/AFP Photo)

Iraqi Shiite tribesmen brandish their weapons as they gather to show their willingness to join Iraqi security forces in the fight against Jihadist militants who have taken over several northern Iraqi cities, on June 17 2014, in the southern Shiite Muslim shrine city of Najaf. Fighting erupted at the northern approaches to Baghdad Tuesday as Iraq accused Saudi Arabia of backing militants who have seized swathes of territory in an offensive the UN says threatens its very existence. (Photo by Haidar Hamdani/AFP Photo)

The scene as people light candles to form the letters into the words, “So All Can Vote” to support Voting Rights during a vigil on June 24, 2014 in Washington, DC. The vigil was a memorial to Andrew Goodman, James Chaney and Michael Schwerner, who were killed in 1964 by the KKK in Mississippi. The vigil included a display of 3,000 candles at the base of the Lincoln Memorial near the reflecting pool. Bend the Arc: A Jewish Partnership for Justice organization sponsored the memorial event on the 50th anniversary of their activist murders. (Photo by Michel du Cille/The Washington Post)

Chauvet cave curator Marie Bardisa looks at cave paintings in the cave, on June 13, 2014 in Vallon Pont d'Arc. France is submitting a request to have the Chauvet cave in Ardeche classified by the UNESCO world heritage committee as a “world heritage site”. (Photo by Jeff Pachoud/AFP Photo)