German Chancellor Angela Merkel arrives for a news conference in Berlin, Germany, July 28, 2016.

Hannibal Hanschke/Reuters

German Chancellor Angela Merkel arrives for a news conference in Berlin, Germany

Faithfuls greet Pope Francis as he arrives at the Jasna Gora shrine in Czestochowa, Poland July 28, 2016. REUTERS/David W Cerny

David W Cerny/Reuters

Faithfuls greet Pope Francis as he arrives at the in Czestochowa, Poland 

In this photograph taken on July 27, 2016, Afghan boy children run behind a cart transporting bricks on the outskirts of Jalalabad.  / AFP PHOTO / NOORULLAH SHIRZADANOORULLAH SHIRZADA/AFP/Getty Images

Noorullah Shirzada/AFP

Afghan children run behind a cart transporting bricks on the outskirts of Jalalabad 

***BESTPIX*** PHILADELPHIA, PA - JULY 27:   (Editors Note: Image has been converted to black and white) US President Barack Obama delivers remarks on the third day of the Democratic National Convention at the Wells Fargo Center, July 27, 2016 in Philadelphia, Pennsylvania. Democratic presidential candidate Hillary Clinton received the number of votes needed to secure the party's nomination. An estimated 50,000 people are expected in Philadelphia, including hundreds of protesters and members of the media. The four-day Democratic National Convention kicked off July 25.  (Photo by Win McNamee/Getty Images)

Win McNamee/Getty

US President Barack Obama delivers remarks on the third day of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania. Democratic presidential candidate Hillary Clinton received the number of votes needed to secure the party’s nomination

BRISTOL, ENGLAND - JULY 27:  A construction worker moves a traffic cone in front of artwork by Odeith and is part of the 2016 Upfest on July 27, 2016 in Bristol, England. The annual event, which this year helped celebrate 45 years of the Mr Men and Little Miss book series, started in 2008 and is said to be the largest free street art and graffiti festival in Europe. The festival now attracts more than 300 artists including Inkie, Jody, Pichi & Avo and Leon Keer from 25 countries to paint live on walls and surfaces around Bedminster and Southville areas of the city of Bristol, the hometown of guerrilla artist Banksy. Some of the graffiti art work is painted on moveable boards and temporary hoardings, but murals on some venues and buildings remain all year until the next festival.  (Photo by Matt Cardy/Getty Images)

Matt Cardy/Getty

A construction worker moves a traffic cone in front of artwork by Odeith and is part of the 2016 Upfest in Bristol, England. The annual event, which this year helped celebrate 45 years of the Mr Men and Little Miss book series, started in 2008 and is said to be the largest free street art and graffiti festival in Europe. 

Workers check on the flag placement on the stage as they prepares for the third day session of the Democratic National Convention in Philadelphia, Wednesday, July 27, 2016. (AP Photo/John Locher)

John Locher/AP

Workers check on the flag placement on the stage as they prepares for the third day session of the Democratic National Convention in Philadelphia 

epa05443458 An Indian paramilitary soldier stands guard during curfew in downtown area of Srinagar, the summer capital of Indian Kashmir, 27 July 2016. According to local news reports, authorities have re-imposed curfew in some parts of Srinagar followed by clashes that erupted on 26 July after the curfew was lifted.  The curfew, however, continues in south Kashmir. So far 50 civilians have been killed and over 3000 injured following the protests over the killing of Hizb-ul-Mujahideen commander, Burhan Muzaffar Wani and his two associates in a gunfight on 08 July.  EPA/FAROOQ KHAN

Farooq Khan/EPA

An Indian paramilitary soldier stands guard during curfew in downtown area of Srinagar, the summer capital of Indian Kashmir

epa05443258 Thick smoke spreads over a burning Styrofoam site while firefighters attempt to put it out in Wittenberge, Germany, 27 July 2016. According to initial information, no one was injured in the factory from Austrian insulation company Austrotherm. Lightning set the giant Styrofoam site on fire and caused millions of euros worth of damage.  EPA/JENS WEGNER

Jens Wegner/EPA

Thick smoke spreads over a burning Styrofoam site while firefighters attempt to put it out in Wittenberge, Germany. According to initial information, no one was injured in the factory from Austrian insulation company Austrotherm 

Artist Jonathan Owen unveils a modern interpretation of the female nude, housed in Edinburgh's Burns Monument which is open to the public for the first time in 180 years for the Edinburgh Art Festival 2016. The festival is open to the public between July 28 and August 28. PRESS ASSOCIATION Photo. Picture date: Wednesday July 27, 2016. Photo credit should read: Jane Barlow/PA Wire.

Jane Barlow/PA

Artist Jonathan Owen unveils a modern interpretation of the female nude, housed in Edinburgh’s Burns Monument which is open to the public for the first time in 180 years for the Edinburgh Art Festival 2016 

epa05443055 Palestinians check a damaged building after the Israeli army carried out an operation hunting down a wanted Palestinian man, in the village of Soref, near Hebron, the West Bank, 27 July 2016. The Israeli army purportedly killed Mohammad Faqeeh and arrested three others after a fire fight. Faqeeh allegedly shot and killed an Israeli settler south of Hebron on 01 July 2016, members of the Israeli army said.  EPA/ABED AL HASHLAMOUN

Abed Al Hashlamoun/EPA

Palestinians check a damaged building after the Israeli army carried out an operation hunting down a wanted Palestinian man, in the village of Soref, near Hebron in the West Bank

epa05442919 Delegates react as Democratic Nominee for United States President Hillary Clinton appears live via satellite at the conclusion of the second day of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, USA, 26 July 2016. The four-day convention is expected to end with Hillary Clinton formally accepting the nomination of the Democratic Party as their presidential candidate in the 2016 election.

Justin Lane/EPA

Delegates react as Democratic Nominee for United States President Hillary Clinton appears live via satellite at the conclusion of the second day of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, USA 

Czarek Sokolowski/AP

Young women from France are among the dozens of thousands of young people from around the globe walking during thunderstorms to the site of a Catholic Mass in the Blonia green in Krakow, Poland 

An aerial view shows people strolling through a crop circle on a field near Mammendorf, southern Germany, on July 26, 2016. The pattern has a diameter of 180 meters. / AFP PHOTO / dpa / Sven Hoppe / Germany OUTSVEN HOPPE/AFP/Getty Images

Outsven Hoppe/AFP/Getty

An aerial view shows people strolling through a crop circle on a field near Mammendorf, southern Germany 

A policeman secures a position in front of the city hall after two assailants had taken five people hostage in the church at Saint-Etienne-du -Rouvray near Rouen in Normandy, France, July 26, 2016. Two attackers killed a priest with a blade and seriously wounded another hostage in a church in northern France on Tuesday before being shot dead by French police.   REUTERS/Pascal Rossignol

Pascal Rossignol/Reuters

A policeman secures a position in front of Saint-Etienne-du-Rouvray’s city hall after two assailants had taken five people hostage in the church at Saint-Etienne-du -Rouvray near Rouen in Normandy. Two attackers killed a priest with a blade and seriously wounded another hostage in a church in northern France on Tuesday before being shot dead by French police 

TOPSHOT - Indian schoolchildren hold masks bearing the image of former Indian president A.P.J Kalam ahead of the first anniversary of his death during a remembrance event at a school in Chennai

Arun Sanka/AFP/Getty

Indian schoolchildren hold masks bearing the image of former Indian president A.P.J Kalam ahead of the first anniversary of his death during a remembrance event at a school in Chennai 

A picture made available on 26 July 2016 shows dense smoke over Lithi village  during a wildfire on Chios island, Greece, 25 July 2016. The huge wildfire that broke out early 25 July 2016, on the island of Chios which has burned 3,500 hectares of forest and farm land, set under control. Over 90 percent of the mastic trees at the villages of Lithi, Elata and Vessa were destroyed while a large number of mastic trees were burned at the villages of Mesta, Armolia and Pyrgi.  EPA/KOSTAS KOYRGIAS

Kostas Koyrgias/EPA

Dense smoke over Lithi village during a wildfire on Chios island, Greece. The huge wildfire that broke out on Sunday on the island of Chios which has burned 3,500 hectares of forest and farm land 

BATON ROUGE, LA - JULY 15:  The body of Alton Sterling, who was shot and killed by Baton Rouge Police officers, lies in a casket as he is brought into his funeral at Southern University on July 15, 2016 in Baton Rouge, Louisiana.  (Photo by Sean Gardner/Getty Images)

Sean Gardner/Getty

The body of Alton Sterling, who was shot and killed by Baton Rouge Police officers, lies in a casket as he is brought into his funeral at Southern University in Baton Rouge, Louisiana 

Toby Melville/Reuters

A man delivers flowers to 10 Downing Street in central London 

epa05425606 Workers install a commercial advertisement on the side of a building in Beijing, China, 15 July 2016. China's Gross Domestic Product (GDP) growth was at 6.7 percent in the second quarter of 2016, according to figures from the National Bureau of Statistics (NBS). The growth is the lowest rate recorded since 2009.  EPA/ROLEX DELA PENA

Rolex Dela Pena/EPA

Workers install a commercial advertisement on the side of a building in Beijing 

A man walks through debris scatterd on the street the day after a truck ran into a crowd at high speed killing scores celebrating the Bastille Day July 14 national holiday on the Promenade des Anglais in Nice, France, July 15, 2016.      REUTERS/Eric Gaillard

Eric Gaillard/Reuters

A man walks through debris scatterd on the street the day after a truck ran into a crowd at high speed killing scores celebrating the Bastille Day on the Promenade des Anglais in Nice, France