Athletes in action during the international parachuting competition Mountain Gravity in Quinto, Switzerland, 27 August 2015. Some 200 participants from all over the world are expected to jump at the event running from 22 to 30 August 2015. (Photo by Samuel Golay/EPA)

Women look at a swastika, in front of the Red Cross asylum center in Lyngbygaard, in Trustrup in the west of Denmark August 27, 2015. The asylum center was vandalized by unidentified men, who drew Nazi symbols and wrote a message reading “first warning”, on Wednesday night. A vehicle was also set on fire outside the center. Police told local media, it was a the third time the asylum center was targeted by vandals with an apparent political motive. (Photo by Bo Amstrup/Reuters/Scanpix Denmark)

Louisiana State Police SWAT officer responds to a barricaded suspect following stabbing and shooting incidents in Sunset, Louisiana, August 26, 2015. A police officer was shot and two people stabbed in a southwest Louisiana town on Wednesday, with a suspect barricading himself in a convenience store, police said. (Photo by Leslie Westbrook/Reuters/The Advocate)

A demonstrator wearing a skull mask takes part in a protest to mark the eleven-month anniversary of their disappearance in Mexico City, Mexico August 26, 2015. The students' disappearance on the night of September 26, 2014 in the southwestern city of Iguala triggered massive protests in Mexico and calls for justice. Officials say they were abducted by corrupt police officers, who handed them over to a local drug gang. The words the earring read: “We are missing 43”. (Photo by Henry Romero/Reuters)

Mexican farmers and activists hold up machetes during a protest to mark the eleven-month anniversary of their disappearance of the 43 missing students of the Ayotzinapa teachers' training college, in Mexico City, Mexico August 26, 2015. (Photo by Henry Romero/Reuters)

Riot policemen stand guard along a street as a demonstrator takes part in a protest to mark the eleven-month anniversary of their disappearance of the 43 missing students of the Ayotzinapa teachers' training college, in Mexico City, Mexico August 26, 2015. (Photo by Henry Romero/Reuters)

A paramilitary police officer in plain-clothes holding an umbrella keeps watch on Beijing's Tiananmen Square, August 27, 2015. Major Western leaders will not attend a military parade in China next week to mark the end of World War Two, leaving President Xi Jinping to stand with leaders and officials from Russia, Sudan, Venezuela and North Korea at his highest-profile event of 2015. (Photo by Jason Lee/Reuters)

A convoy of Indian army soldiers patrols a road in Ahmedabad, India, August 27, 2015. The Indian army patrolled riot-hit areas of Prime Minister Narendra Modi's home state of Gujarat on Thursday after the death toll rose to seven in two days of caste-related violence. (Photo by Amit Dave/Reuters)

A woman pushes a cart past a damaged passenger bus which was burnt in Wednesday's clashes between protesters and police in Ahmedabad, India, August 27, 2015. (Photo by Amit Dave/Reuters)

Indian army soldiers patrol the streets of Ahmedabad, India, August 27, 2015. (Photo by Amit Dave/Reuters)

A passenger train crosses a bridge as it travels from Jakarta to Bandung near Padalarang, West Java, Indonesia August 25, 2015. Japan's prime minister has dispatched a special envoy to offer Jakarta a sweetened deal to build Indonesia's first high-speed railway, an embassy official said, in an eleventh hour move that highlights the importance of winning the multi-billion dollar project over China. The two Asian giants are in a neck-and-neck contest to win a contract to construct a rail line between the capital Jakarta and textile hub Bandung, a project that would bolster their influence in the strategically important Southeast Asian nation. (Photo by Darren Whiteside/Reuters)

A passenger train crosses the Chikubang bridge as it travels from the city of Bandung to Jakarta near Padalarang, West Java, Indonesia August 25, 2015. (Photo by Darren Whiteside/Reuters)

Naga Sadhus, or Hindu holy men, arrive at a camp before a procession during Kumbh Mela or the Pitcher Festival in Trimbakeshwar, India, August 27, 2015. Hundreds of thousands of Hindus took part in the religious gathering at the banks of the Godavari river in Nashik city at the festival, which is held every 12 years in different Indian cities. (Photo by Danish Siddiqui/Reuters)

A Naga sadhu, or a Hindu holy man, applies ash at his camp before a procession during Kumbh Mela or the Pitcher Festival in Trimbakeshwar, India, August 27, 2015. (Photo by Danish Siddiqui/Reuters)

Sadhus, or Hindu holy men, sit on a chariot as they take part in a procession during Kumbh Mela or the Pitcher Festival in Trimbakeshwar, India, August 27, 2015. (Photo by Danish Siddiqui/Reuters)

Naga sadhus, or Hindu holy men, wait inside their camp before a procession during Kumbh Mela or the Pitcher Festival in Trimbakeshwar, India, August 27, 2015. (Photo by Danish Siddiqui/Reuters)

A Hindu Guru sits atop of a chariot as he participates in a procession during Kumbh Mela, or Pitcher Festival, at Trimbakeshwar, India, Thursday, August 27, 2015. Hindus believe taking a dip in the waters of a holy river during the festival will cleanse them of their sins. The festival is held four times every 12 years. (Photo by Bernat Armangue/AP Photo)

Indian women pray to an idol of elephant-headed Hindu god Ganesha at the Kumbh Mela, or Pitcher Festival, in Nasik, India, Thursday, August 27, 2015. Millions are expected to attend this year's two-month festival, which began in mid-July and runs until the end of September. The festival is held four times every 12 years. (Photo by Tsering Topgyal/AP Photo)

A demonstrator holds a placard during a protest calling for the release of Avraham Mengisto at the Erez Crossing in southern Israel, near the Gaza Strip August 27, 2015. Two Israeli citizens, one of them Mengisto, are being held by Hamas in the Gaza Strip, Prime Minister Benjamin Netanyahu said last month, a situation that could lead to demands for a prisoner exchange between Israel and the Islamist militant group. Hamas, the Palestinian enclave's dominant faction, declined to confirm or deny it had the captives. (Photo by Amir Cohen/Reuters)

A Russian Sukhoi Su-25 jet fighter flies during a drill at the Nitka training complex in the village of Novofedorovka, west of the Crimean city of Simferopol, August 27, 2015. Pilots of the Russian Navy's Northern Fleet's deck-based aviation are taking part in a military exercise in Crimea. (Photo by Pavel Rebrov/Reuters)

The Cotopaxi volcano, one of the world's highest active volcanoes, spews ash and smoke as seen from Quito, Ecuador, August 27, 2015. Ecuadorian authorities are monitoring activity at Cotopaxi volcano, which prompted Ecuador's President Rafael Correa to declare a state of emergency and authorities to maintain a yellow alert for eruptions as bursts of ash keep spewing from the snow-encircled crater of the volcano and falling in gusts on residential communities. (Photo by Gary Granja/Reuters)

Guests, with their hair blown back, watch while Marine One takes off as U.S. President Barack Obama departs the White House in Washington August 27, 2015. Obama is traveling to New Orleans to commemorate the 10th anniversary of Hurricane Katrina. (Photo by Kevin Lamarque/Reuters)

U.S. President Barack Obama walks toward Marine One as he departs the White House in Washington August 27, 2015. (Photo by Kevin Lamarque/Reuters)

Balloons of the installation “Heartbeat” are seen at Covent Garden Market in London, Thursday, August 27, 2015. “Heartbeat” is French artist Charles Petillon's first public art installation and his first ever live work outside of France, uniting modern art with world-class architecture. Weaving its way through the South Hall of the Grade II listed Market Building, "Heartbeat" is created from 100,000 white balloons and stretches 54 meters in length and 12 meters in width, incorporating gentle pulsating white light to symbolise the beating of a heart and reflect the history, energy and dynamism of the district. (Photo by Frank Augstein/AP Photo)

A general view of the installation “Heartbeat” by French visual artist Charles Petillon at Covent Garden market in London, Britain, 26 August 2015. The artwork containing of 100,000 white balloons stretches for 54 metres long and 12 metres wide. The project will be on display until 27 September. (Photo by Facundo Arrizabalaga/EPA)

A woman carries a rose as she walks under an art installation made of over 100,000 white balloons by French artist Charles Petillon inside Covent Garden market in London, Britain, August 27, 2015. (Photo by Suzanne Plunkett/Reuters)

People eat lunch under an art installation made of over 100,000 white balloons by French artist Charles Petillon in Covent Garden market in London, Britain, August 27, 2015. (Photo by Suzanne Plunkett/Reuters)

Bring Back Our Girls (BBOG) campaigners look on during a protest procession marking the 500th day since the abduction of girls in Chibok, along a road in Abuja August 27, 2015. The Islamist militant group Boko Haram kidnapped some 270 girls and women from a school in Chibok a year ago. More than 50 eventually escaped, but at least 200 remain in captivity, along with scores of other girls kidnapped before the Chibok girls. (Photo by Afolabi Sotunde/Reuters)

Markarian 231, a binary black hole found in the center of the nearest quasar host galaxy to Earth, is seen in a NASA illustration released August 27, 2015. Like a pair of whirling skaters, the black-hole duo generates tremendous amounts of energy that makes the core of the host galaxy outshine the glow of the galaxy's population of billions of stars, according to a NASA news release. Hubble observations of the ultraviolet light emitted from the nucleus of the galaxy were used to deduce the geometry of the disk, and astronomers were surprised to see light diminishing close to the central black hole, said NASA. (Photo by Reuters/NASA)

A hooded demonstrator runs away from a riot policeman while demanding changes in the education system in Santiago, Chile, August 27, 2015. (Photo by Pablo Sanhueza/Reuters)

Brazil's President Dilma Rousseff attends a reception ceremony for the delegation of Brazil in the Pan American Games and Parapan American of Toronto in 2015 and tribute to the 10 years of the program Bolsa Atleta (Bolsa Athlete), at the Planalto Palace in Brasilia, Brazil August 27, 2015. (Photo by Ueslei Marcelino/Reuters)

Indigenous people participate in a demonstration demanding the resignation of Guatemalan President Otto Perez Molina in Guatemala City, August 27, 2015. Former Guatemalan Vice President Roxana Baldetti will be held in jail throughout her trial over an alleged customs racket, a judge ruled on Wednesday. Baldetti, who was arrested on Friday, has been charged with illicit association, bribery and fraud over a customs racket she allegedly led with President Otto Perez. On Tuesday, Guatemala's Supreme Court approved a petition by the attorney general to impeach Perez over the scam. Congress must still give its approval if he is to face prosecution. (Photo by Jorge Dan Lopez/Reuters)

A San Carlos University student participates in a demonstration to demand for the resignation of Guatemalan President Otto Perez Molina in Guatemala City, Guatemala, August 27, 2015. (Photo by Jose Cabezas/Reuters)

The Reindalen Valley in the Norwegian archipelago of Svalbard is seen in a combination of NASA images acquired by the Operational Land Imager on the Landsat 8 satellite on April 29 (L) and July 9, 2015 and released August 27, 2015. Despite its northerly location 1,300 kilometers (800 miles) from the North Pole, the West Spitsbergen Current brings a relatively warm stream of water from the south into the fjords and inlets of western Svalbard. This warm water moderates the climate enough that coastal areas and certain valleys witness an explosion of green in the summer. (Photo by Reuters/NASA)

German peace activist and co-initiator Christa Senberg stands in front of an old diesel locomotive covered by a colourful knitted garment in Zossen, Germany, 26 August 2015 (issued 27 August). The movement “Knitting for Peace” is held for the second time after a huge success in 2013, where many dedicated knitting and crochet fans from all over Germany and neighbouring countries turned the diesel locomotives into symbols for piece. Under the slogan “Make Love, Not War” participants have been invited via social networks to submit their handycrafts again this year. (Photo by Patrick Pleul/EPA)

A banana vendor waits for costumers at Lambaro traditional Market, in Aceh, north Sumatra, Indonesia, 27 August 2015. The Indonesian government is expected to announce new policies on 27 August 2015, meant to boost the value of the Indonesian Rupiah and increase investment into South East Asia's largest economy. (Photo by Hotli Simanjuntak/EPA)

A currency trader stretches while working at the foreign exchange dealing room of the Korea Exchange Bank headquarters in Seoul, South Korea, Thursday, August 27, 2015. Asian stocks rose Thursday after Wall Street soared overnight, breaking a six-day string of losses. (Photo by Ahn Young-joon/AP Photo)

This NASA photo obtained August 27, 2015 shows NASA astronaut Kjell Lindgren corrals the supply of fresh fruit that arrived August 25, 2015 on the Kounotori 5 H-II Transfer Vehicle (HTV-5.) Visiting cargo ships often carry a small cache of fresh food for crew members aboard the International Space Station. (Photo by AFP Photo/NASA)

This is a Thursday, November 17, 2011 file photo of Antique Wine Company's employees poses with three Melchiors and a standard size bottle of Cos D'Estournel wine at the wine merchant in London, Thursday, November 17, 2011. A Melchior holds 18 litres, 24 bottles or 102 glasses of wine. The free online dictionary of current usage, created by the publishers of the venerable Oxford English Dictionary, issued its quarterly update Thursday August 27, 2015 of new words that have gained widespread currency in the English language. From the list comes, “wine o'clock” the appropriate time of day to start drinking wine. (Photo by Sang Tan/AP Photo)

Traders work on the floor of the New York Stock Exchange during the morning of August 27, 2015 in New York City. Dow Jones Industrial Average stocks continued their rally, opening approximately 200 points higher today. (Photo by Andrew Burton/Getty Images)

Skeletons are pictured at the vaults of the Museum of Man (Musee de l'Homme) on August 27, 2015 in Paris. The museum will reopen its doors on October 17, 2015 after 6 years of construction works. (Photo by Patrick Kovarik/AFP Photo)

A model wears Reog outfit as part of Kids Carnival during 14th Jember Fashion Carnival on August 27, 2015 in Jember, Indonesia. The 14th Jember Fashion Carnival 2015 theme is Outframe and consists of ten parades, which include; Majapahit, Ikebana, Fossil, Parrot, Circle, Pegasus, Lionfish, Egypt, Melanesia, and Reog. This street carnival is claimed to be one of the biggest in the world and comprises of more than 1000 performers parading along 3.6 km of road used as the catwalk. (Photo by Robertus Pudyanto/Getty Images)