A boy carries his sister, as he walks on rubble of a houseafter it was destroyed by a Saudi-led air strike in Yemen's capital Sanaa, August 11, 2016. REUTERS/Mohamed al-Sayaghi

Mohamed al-Sayaghi/Reuters

A boy carries his sister, as he walks on rubble of a house after it was destroyed by a Saudi-led air strike in Yemen’s capital Sana’a

* Breakfast Time For The Lions At ZSL London Zoo On World Lion Day

Carl Court/Getty

A lioness drinks after being fed by senior keeper Glynn Hennessy at ZSL London

A man watches buffalos cross a river as they head to another grazing area, in Nanchong, Sichuan province, China, August 10, 2016. Picture taken August 10, 2016. China Daily/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY. CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA.

China Daily/Reuters

A man watches buffalos cross a river as they head to another grazing area, in Nanchong, Sichuan province, China 

CAMBERLEY, ENGLAND - AUGUST 11: A Siemens security guard looks on as a Greenpeace activist dressed in a monkey costume demonstrate outside the Siemens' UK headquarters on August 11, 2016 in Camberley, England. Greenpeace activists joined two members of the Amazonian Munduruku tribe at German engineering company Siemens' UK headquarters today to protest the building of mega dams in the Brazilian Amazon and to demand a meeting with senior management at the company. (Photo by Jack Taylor/Getty Images)

Jack Taylor/Getty

A Siemens security guard looks on as a Greenpeace activist dressed in a monkey costume demonstrate outside the Siemens’ UK headquarters in Camberley, England. Greenpeace activists joined two members of the Amazonian Munduruku tribe at German engineering company Siemens’ UK headquarters today to protest the building of mega dams in the Brazilian Amazon and to demand a meeting with senior management at the company 

RIO DE JANEIRO, BRAZIL - AUGUST 09:  People walk in front of portraits produced by artist JR for his inside out project (L) on August 9, 2016 in Rio de Janeiro, Brazil. The artist JR has unveiled numerous art installations across Rio de Janiero celebrateing olympic athletes.  (Photo by Chris McGrath/Getty Images)

Chris McGrath/Getty

People walk in front of portraits produced by artist JR for his inside out project in Rio de Janeiro, Brazil. The artist JR has unveiled numerous art installations across Rio de Janiero celebrating olympic athletes

A couple look at the mural on Free Derry Corner depicting an image of Bishop Daly as parishioners and well wishers pay their respects to the late retired Bishop of Derry, Dr. Edward Daly as he lies in state at St. Eugene's Cathedral on August 9, 2016 in Londonderry, Northern Ireland. The iconic image of the then Fr Daly waving a handkerchief over one of the Bloody Sunday victims became one of the most enduring images of the Troubles in Northern Ireland. Bishop Daly who has been described as a fearless peace-builder passed away at the age of 82 following a brief illness.

Charles McQuillan/Getty

A couple look at the mural on Free Derry Corner depicting an image of Bishop Daly as parishioners and well wishers pay their respects to the late retired Bishop of Derry, Dr. Edward Daly as he lies in state at St. Eugene’s Cathedral in Londonderry

Putin attends a meeting with Turkish President Tayyip Erdogan in St. Petersburg, Russia, August 9, 2016.  REUTERS/Sergei Karpukhin

Sergei Karpukhin/Reuters

Russian President Vladimir Putin attends a meeting with Turkish President Tayyip Erdogan in St. Petersburg, Russia

A group of workers fix letters to make the word "EXCUSE" while making a set for an advertisement in Colombo, Sri Lanka, August 9, 2016. REUTERS/Dinuka Liyanawatte   FOR EDITORIAL USE ONLY. NO RESALES. NO ARCHIVES     TPX IMAGES OF THE DAY       TO MATCH SPECIAL REPORT XXX

Dinuka Liyanawatte/Reuters

A group of workers fix letters to make the word “EXCUSE” while making a set for an advertisement in Colombo, Sri Lanka

An Indian Border Security Force (BSF) soldier salutes near the coffins of three colleagues during a wreath-laying ceremony at BSF headquarters in Srinagar on August 9, 2016. At least three BSF soldiers and one suspected militant were killed in a gunfight close to the Line of Control in north Kashmirs Kupwara district on August 8. / AFP PHOTO / TAUSEEF MUSTAFATAUSEEF MUSTAFA/AFP/Getty Images

Tauseef Mustafa/AFP/Getty

An Indian Border Security Force soldier salutes near the coffins of three colleagues during a wreath-laying ceremony at BSF headquarters in Srinagar 

People watch an elimination round of the men's individual archery competition at the Sambadrome venue, located in a residential area, at the Summer Olympics in Rio de Janeiro, Brazil, Monday, Aug. 8, 2016. Spectators below hold Mexico's national flag. (AP Photo/Alessandra Tarantino)

Alessandra Tarantino/AP

People watch an elimination round of the men’s individual archery competition at the Sambadrome venue, located in a residential area, at the Summer Olympics in Rio de Janeiro, Brazil 

Fiji's Rebecca Tavo, left, scores a try as USA's Kelly Griffin, defends during the women's rugby sevens match at the Summer Olympics in Rio de Janeiro, Brazil, Monday, Aug. 8, 2016. (AP Photo/Themba Hadebe)

Themba Hadebe/AP

Fiji’s Rebecca Tavo, left, scores a try as USA’s Kelly Griffin, defends during the women’s rugby sevens match at the Summer Olympics in Rio de Janeiro, Brazil

Indian workers take a nap near idols of the elephant-headed Hindu god Lord Ganesha at a roadside workshop in New Delhi on August 8, 2016.

Money Sharma/APP/Getty

Indian workers take a nap near idols of the elephant-headed Hindu god Lord Ganesha at a roadside workshop in New Delhi 

Pakistani local journalists react over the body of a news cameraman after a bomb explosion at a government hospital premises in Quetta on Monday

Banaras Khan/AFP

Pakistani local journalists react over the body of a news cameraman after a bomb explosion at a government hospital premises in Quetta on Monday 

Passengers disembark a Southern train at Victoria Station in London, Britain August 8, 2016.

Neil Hall/Reuters

Passengers disembark a Southern train at Victoria Station in London, England. Hundreds of thousands of Southern rail passengers face a week of travel chaos as a five-day strike cripples major rail routes into London

Bullfighters and assistants walk along the ring during the "paseillo" or ritual entrance to the arena prior a bullfight at the Las Ventas bullring in Madrid,

Francisco Seco/AP

Bullfighters and assistants walk along the ring during the “paseillo” or ritual entrance to the arena prior a bullfight at the Las Ventas bullring in Madrid 

A woman prepares cutout numbers 8 before a ceremony marking the 28th anniversary of the 8888 uprising in Yangon, Myanmar, 08 August 2016. The 08 August 1988, also known as '8888 Uprising' marked the start of protests by students in Yangon that would soon spread through the country. The demonstrations were aimed at the then ruling Burma Socialist Programme Party regime of the one-party state, headed by General Ne Win. The protests ended in September the same year after a military coup by the State Law and Order Restoration Council

Lynn Bo Bo/EPA

A woman prepares many cutouts of the number eight before a ceremony marking the 28th anniversary of the 8888 uprising in Yangon, Myanmar 

An Indian paramilitary trooper stands guard during a curfew in the Batmaloo area of Srinagar

Tauseef Mustafa/AFP/Getty

An Indian paramilitary trooper stands guard during a curfew in the Batmaloo area of Srinagar, Kashmir 

Technician Steven Heinz adjusts a remote camera during an off day for women's basketball at the Youth Center at the 2016 Summer Olympics in Rio de Janeiro, Brazil,

Carlos Osorio/AP

Technician Steven Heinz adjusts a remote camera at the Youth Center at the 2016 Summer Olympics in Rio de Janeiro, Brazil 

Mikoyan MiG-29 jet fighters of Strizhi aerobatic team fly in formation during International Army Games 2016 in Dubrovichi outside Ryazan

Maxim Shemetov/Reuters

Mikoyan MiG-29 jet fighters of the Strizhi (Swifts) aerobatic team fly in formation during the International Army Games 2016, in Dubrovichi outside Ryazan, Russia, 

The sun is seen through the cloudy sky, beside the bronze sculpture of Victoria, in Berlin

Clemens Bilan/AFP

The sun is seen through the cloudy sky, beside the bronze sculpture of Victoria, in Berlin