A Muslim pilgrim sits on the top of Mount Al-Noor, where Muslims believe Prophet Mohammad received the first words of the Koran through Gabriel in the Hera cave, ahead of the annual haj pilgrimage in the holy city of Mecca, Saudi Arabia September 7, 2016. REUTERS/Ahmed Jadallah

Ahmed Jadallah/Reuters

A Muslim pilgrim sits on the top of Mount Al-Noor, where Muslims believe Prophet Mohammad received the first words of the Koran through Gabriel in the Hera cave, ahead of the annual haj pilgrimage in the holy city of Mecca, Saudi Arabia

  A tethered hot air balloon flies over the ancient neolithic monument of Stonehenge near Amesbury on September 7, 2016 in Wiltshire, England.  To mark the 30th anniversary of Stonehenge becoming a World Heritage Site, English Heritage has launched a competition offering members of the public the chance of a hot balloon ride which allows the chance to see a  unique view of Stonehenge within in a wider prehistoric landscape but also the see the recent changes to its setting in recent years including the removal of the A344 and the old car park.  (Photo by Matt Cardy/Getty Images)

Matt Cardy/Getty

A tethered hot air balloon flies over the ancient neolithic monument of Stonehenge near Amesbury in Wiltshire, England. To mark the 30th anniversary of Stonehenge becoming a World Heritage Site.

A fighter from the Jaish al-Islam (Islam Army) runs to avoid sniper fire, in the village of Tal al-Siwan area of the rebel-held stronghold of Douma, on the outskirts of Damascus, on September 5, 2016. / AFP PHOTO / Sameer Al-DoumySAMEER AL-DOUMY/AFP/Getty Images

Sameer Al-Doumy/AFP/Getty

A fighter from the Jaish al-Islam (Islam Army) runs to avoid sniper fire, in the village of Tal al-Siwan area of the rebel-held stronghold of Douma, on the outskirts of Damascus, Syria 

An employee poses for a photograph as she looks on at the Chakraview installation, designed by Sumant Jayakrishnan, representing India, during a preview of the London Design Biennale at Somerset House in London, U.K., on Tuesday, Sept. 6, 2016. Over 30 countries and territories have newly commissioned works in the exhibition, that runs from Sept. 7 to Sept. 27, that explore the theme "Utopia by Design", according to the organizer's website.

Simon Dawson/Bloomberg

An employee poses for a photograph as she looks on at the Chakraview installation, designed by Sumant Jayakrishnan, representing India, during a preview of the London Design Biennale at Somerset House in London 

This undated picture released from North Korea's official Korean Central News Agency (KCNA) on September 6, 2016 shows North Korean leader Kim Jong-Un inspecting the fire drill of ballistic rockets by Hwasong artillery units of the KPA Strategic Force at an undisclosed location in North Korea. / AFP PHOTO / KCNA VIA KNS / KCNA /  - South Korea OUT / REPUBLIC OF KOREA OUT   ---EDITORS NOTE--- RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO/KCNA VIA KNS" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS THIS PICTURE WAS MADE AVAILABLE BY A THIRD PARTY. AFP CAN NOT INDEPENDENTLY VERIFY THE AUTHENTICITY, LOCATION, DATE AND CONTENT OF THIS IMAGE. THIS PHOTO IS DISTRIBUTED EXACTLY AS RECEIVED BY AFP.  / KCNA/AFP/Getty Images

Kcna/AFP/Getty

Kim Jong-Un inspects the fire drill of ballistic rockets at an undisclosed location in North Korea 

Members of the honor guard prepare before arrival of French President Francois Hollande (not pictured) at the Presidential Palace in Hanoi on September 6, 2016.   Holland is on a two day official visit. / AFP PHOTO / POOL / MINH HOANG / POOLMINH HOANG / POOL/AFP/Getty Images

Minh Hoang/AFP/Getty

Members of the honour guard prepare before arrival of French President Francois Hollande at the Presidential Palace in Hanoi

U.S. President Barack Obama holds his hands together and bows at the end of his address at the Lao National Cultural Hall, on the sidelines of the ASEAN Summit, in Vientiane, Laos September 6, 2016. REUTERS/Jonathan Ernst

Jonathan Ernst/Reuters

U.S. President Barack Obama holds his hands together and bows at the end of his address at the Lao National Cultural Hall, on the sidelines of the ASEAN Summit, in Vientiane Laos 

Sisters of Mother Teresa's Missionaries of Charity walk up the steps to take their seats beneath St. Peter's Basilica for a thanksgiving Mass following Mother Teresa's canonization, in St. Peter's Square, at the Vatican, Monday, Sept. 5, 2016. Elevating the "saint of the gutters" to one of the Catholic Church's highest honors, Pope Francis on Sunday praised Mother Teresa for her radical dedication to society's outcasts and her courage in shaming world leaders for the "crimes of poverty they themselves created." (AP Photo/Gregorio Borgia)

Gregorio Borgia/AP

Sisters of Mother Teresa’s Missionaries of Charity walk up the steps to take their seats beneath St. Peter’s Basilica for a thanksgiving Mass following Mother Teresa’s canonization, in St. Peter’s Square, at the Vatican 

Alberto Saiz/AP

People look at a wildfire burning nearby Benitachel village, eastern Spain. Spanish firefighters are still working to bring under control a forest blaze near Valencia that forced the evacuation of around 1,000 people

Turkey's President Tayyip Erdogan adjusts earphones during a news conference after the closing of G20 Summit in Hangzhou, Zhejiang Province, China, September 5, 2

Damir Sagolj/Reuters

Turkey’s President Tayyip Erdogan adjusts earphones during a news conference after the closing of G20 Summit in Hangzhou, Zhejiang Province, China

An Indian Hindu devotee transports an idol of the elephant-headed Hindu god, Lord Ganesha in his car, for Ganesh Chaturthi in Mumbai on September 5, 2015.  The Ganesh Chaturthi festival, a popular 11-day religious festival which is annually celebrated across India, runs this year from September 5-15, and culminates with the im

Punit Paranj/AFP/Getty

An Indian Hindu devotee transports an idol of the elephant-headed Hindu god, Lord Ganesha in his car, for Ganesh Chaturthi in Mumbai. The Ganesh Chaturthi festival, a popular 11-day religious festival which is annually celebrated across India 

Leg prostheses on display at the Cooperative Orthotic and Prosthetic Enterprise (COPE) Center in Vientiane, Laos, 05 September 2016. COPE was created to provide Unexploded ordnance (UXO) survivors with access to orthotic and prosthetic devices. During the Vietnam War from 1964 to 1973, US troops dropped more than two million tons of bomb on Laos and estimated one third of the nearly 300 million bomb dropped were failed to detonated. Laos is hosting the 28th and 29th ASEAN Summits and Related Summits from 06 to 08 September 2016.  EPA/MAST IRHAM

Mas Irham/EPA

Leg prosthesis on display at the Cooperative Orthotic and Prosthetic Enterprise (COPE) Centre in Vientiane

French business owners and locals blockade the main road into the Port of Calais as they wait the arrival of a convoy of trucks protesting against The Jungle migrant camp on September 5, 2016 in Calais, France. Local people and business owners are taking part in the protest, dubbed Operation Escargot, calling for The Jungle camp at the French port to be demolished. Up to 10,000 migrants are now living at the camp and are using desperate and violent  measures to try and board trucks heading for the UK.  (Photo by Christopher Furlong/Getty Images)

Christopher Furlong/Getty

French business owners and locals blockade the main road into the Port of Calais as they wait the arrival of a convoy of trucks protesting against The Jungle migrant camp in Calais, France. Local people and business owners are taking part in the protest, dubbed Operation Escargot, calling for The Jungle camp at the French port to be demolished 

An Iraqi soldier stands next to a wall with a red cross above a slogan of the Islamic State (IS) group, on September 4, 2016 in the city of Fallujah.

Ahmad Al-Rubaye/AFP/Getty

An Iraqi soldier stands next to a wall with a red cross above a slogan of the Islamic State in the city of Fallujah 

A fiery sky over St Mary's Lighthouse near Whitley Bay, Tyne and Wear, as warm weather is forecast for the week.

Owen Humphreys/PA

A fiery sky over St Mary’s Lighthouse near Whitley Bay, Tyne and Wear, as warm weather is forecast for the week in England 

A man fills barrels with rubble to make a barricade to protect shops in the rebel held Douma neighbourhood of Damascus, Syria

Bassam Khabieh/Reuters

A man fills barrels with rubble to make a barricade to protect shops in the rebel held Douma neighbourhood of Damascus, Syria 

The squad of Frecce Tricolori from the Italian Airforce performs during the Airshow "Airpower 16" on September 2, 2016, in Zeltweg.

Erwin Scheriau/AFP/Getty

The squad of Frecce Tricolori from the Italian Airforce performs during the Airshow “Airpower 16″ in Zeltweg 

Chinese honour guards prepare for the arrival of Turkish President Recep Tayyip Erdogan at Hangzhou Xiaoshan International Airport in Hangzhou on September 2, 2016. World leaders are gathering in Hangzhou for the 11th G20 Leaders Summit from September 4 to 5. / AFP PHOTO / WANG ZHAOWANG ZHAO/AFP/Getty Images

Wang Zhao/AFP/Getty

Chinese honour guards prepare for the arrival of Turkish President Recep Tayyip Erdogan at Hangzhou Xiaoshan International Airport in Hangzhou

Members of bank employees union shout slogans during an anti-government protest rally, organised as part of a nationwide strike, in Mumbai, India September 2, 2016. REUTERS/Danish Siddiqui - RTX2NUZN

Danish Siddiqui/Reuters

Members of bank employees union shout slogans during an anti-government protest rally, organised as part of a nationwide strike, in Mumbai, India 

A resident clears out the hash vending stalls in the Freetown Christiania neighborhood of Copenhagen,

Outuffe Weng/AFP/Getty

A resident clears out the hash vending stalls in the Freetown Christiania neighbourhood of Copenhagen