A file picture taken on October 11, 2012 shows a Swedish manufacturer Saab's Gripen F fighter performing during a flight demonstration of the Swiss Air Force over Axalp in the Bernese Oberland. (Photo by Fabrice Coffrini/AFP Photo)

Colby Fainga'a of the Rebels is lifted in the air to compete for the ball in a lineout during a Melbourne Rebels Super Rugby training session at Visy Park on May 21, 2014 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)

Photographer Paul Zizka in “At One”, Lake Minnewanka, Banff National Park, Alberta, Canada, October 1, 2012. (Photo by Paul Zizka/Caters News)

Horses are seen in silhouette making their way to the track for morning workouts at Belmont Park in Elmont, New York May 21, 2014. The Belmont Stakes will be host to California Chrome as he competes for the coveted triple crown at Belmont Park on June 7, 2014. (Photo by Shannon Stapleton/Reuters)

An armed Thai soldier is reflected in a puddle as he guards a road near a pro-government demonstration site on the outskirts of Bangkok, Thailand Wednesday, May 21, 2014. Thailand's army chief Gen. Prayuth Chan-Ocha assumed the role of mediator Wednesday by summoning the country's key political rivals for face-to-face talks one day after imposing martial law. The meeting ended without any resolution, however, underscoring the profound challenge the army faces in trying to end the country's crisis. (Photo by Wason Wanichakorn/AP Photo)

An officer is pictured at the Cidade da Policia (Police's City) complex during a Civil Police 24-hour strike in Rio de Janeiro May 21, 2014. The police called for the strike to demand for better salaries and benefits. (Photo by Ricardo Moraes/Reuters)

A visitor takes photos from an elevated walkway connecting giant concrete tree-like structures called Supertrees at Gardens by the Bay in Singapore May 28, 2014. (Photo by Edgar Su/Reuters)

People are silhouetted on a sunny morning as they walk past the columns of the Bank of England in the City of London, May 19, 2014. Sterling eased on Monday, on growing talk the Bank of England will step in to cool the UK housing market, which would allow the central bank to keep interest rates lower for longer to sustain recovery elsewhere in the economy. (Photo by Andrew Winning/Reuters)

A local boy plays football on Iracema Beach on June 11, 2014 in Fortaleza, Brazil. (Photo by Robert Cianflone/Getty Images)

Indian villagers cross the Daya River as they return home after finishing daily marketing on a hot afternoon, on the outskirts of eastern Bhubaneswar on May 19, 2014. (Photo by Asit Kumar/AFP Photo)

A protester runs away as Turkish riot police use water cannons to disperse protesters during a demonstration against the recent mine accident in Soma, on May 22, 2014, in the Okmeydani district of Istanbul. One man was injured when Turkish riot police today fired tear gas and water cannon to disperse a group of Istanbul protesters hurling Molotov cocktails and stones. Tensions are high in Turkey with the approach of the first anniversary of deadly nationwide anti-government protests and in the wake of an unprecedented mine disaster that claimed 301 lives last week. (Photo by Bulent Kilic/AFP Photo)

A group of Pakistani children play football by the Ravi River in Lahore on May 25, 2014. (Photo by Arif Ali/AFP Photo)

Indian residents wade through waters at Sangam, the confluence of the rivers Ganges, Yamuna and the mythical Saraswati, in Allahabad on June 2, 2014. Allahabad, located in the north Indian state of Uttar Pradesh and where the Ganges, Yamuna and Saraswati rivers meet, is a focal point for Hindu pilgrims where they gather to bathe in the holy waters of the three rivers. (Photo by Sanjay Kanojia/AFP Photo)

Iya Traore, a former professional football player, holds on to a lamppost as he performs for visitors in the Montmatre area of Paris, on June 9, 2014. (Photo by Ludovic Marin/AFP Photo)

Onlookers stand on the promenade at Marine Drive as sea waves lash the shore during high tide in Mumbai on June 12, 2014. The India Meteorological Department (IMD) having declared the onset of the monsoon, has predicted below average rains with a 23 percent chance of a “deficient monsoon”. The monsoon season, which runs from June to September, accounts for about 80 percent of India's annual rainfall, vital for a farm economy which lacks adequate irrigation facilities. (Photo by Indranil Mukherjee/AFP Photo)

Horses and exercise riders train on the main track during sunrise at Belmont Park on May 30, 2014 in Elmont, New York. (Photo by Al Bello/Getty Images)

An Afghan resident rides on his donkey as the sun sets on the outskirts of Mazar-i-sharif on May 26, 2014. (Photo by Farshad Usyan/AFP Photo)

A Thai soldier mans his machine gun atop a military vehicle outside the Center for the Administration of Peace and Order in Bangkok after soldiers were sent in to seize it, on May 20, 2014. (Photo by Wason Wanichakorn/AP Photo)

Palestinian militants from Mujahideen Brigades, a small military group in Gaza, participate in a training session in Gaza City, Tuesday, June 10, 2014. (Photo by Hatem Moussa/AP Photo)

Boys play ball May 23, 2014 in a street decorated for the upcoming World Cup in Brasilia, one of the host cities for the international soccer tournament that starts in June. (Photo by Eraldo Peres/Associated Press)

An American bison stands in the grasslands of the Janos Biosphere Reserve in Janos, Chihuahua state, Mexico. (Photo by Jose Luis Gonzalez/Reuters)

Chinese Paramilitary security force officers stand under a portrait of Mao Zedong outside the Forbidden City, at Tiananmen Square in Beijing, on June 2, 2014. (Photo by Kevin Frayer/Getty Images)

A couple rehearses before competing at the Tango Dance World Cup 2012, salon category, in Buenos Aires, Argentina, Monday, August 20, 2012. (Photo by Natacha Pisarenko/AP Photo)

16 year-old Yanik Wolter controls a model helicopter during sunset on a field in Gleidingen near Hannover, northern Germany, Thursday, June 12, 2014. The small helicopter with up to 1.50 meters wingspan is remotely controlled. With top speeds of over 200 kilometers per hour, the model flyer steers the helicopter over secure meadows and cornfields. (Photo by Julian Stratenschulte/AP Photo/DPA)