U.N. Peacekeepers patrol the streets during violent protests to press President Joseph Kabila to step down, in the Democratic Republic of Congo's capital Kinshasa, September 20, 2016. REUTERS/Kenny Katombe 

A U.N. peacekeeper patrols the streets during violent protests to press President Joseph Kabila to step down, in the Democratic Republic of Congo's capital Kinshasa, September 20, 2016. REUTERS/Kenny Katombe 

Returning Ivorian refugees disembark from a pickup truck next to UN peacekeepers after arriving from Liberia in the village of Prolo, Ivory Coast May 20,2016. REUTERS/Luc Gnago 

Returning Ivorian refugees disembark from a pickup truck next to UN peacekeepers after arriving from Liberia in the village of Prolo, Ivory Coast May 20,2016. REUTERS/Luc Gnago 

U.N. peacekeepers take a break as they patrol along a street during the presidential election in Bangui, the capital of Central African Republic, December 30, 2015. REUTERS/Media Coulibaly 

U.N. peacekeepers take a break as they patrol along a street during the presidential election in Bangui, the capital of Central African Republic, December 30, 2015. REUTERS/Media Coulibaly 

U.N. peacekeepers patrol in their armored personnel carriers (APC) along a street during the presidential election in the mainly Muslim PK-5 neighborhood in Bangui, the capital of Central African Republic, December 30, 2015. REUTERS/Media Coulibaly 

U.N. peacekeepers stand guard as the electorate queue to cast their ballots at polling centre during the presidential election in the mainly Muslim PK-5 neighborhood in Bangui, the capital of Central African Republic, December 30, 2015. REUTERS/Media Coulibaly TPX IMAGES OF THE DAY

U.N. peacekeepers stand guard as the electorate queue to cast their ballots at a polling centre during the presidential election in the mainly Muslim PK-5 neighborhood in Bangui, the capital of Central African Republic, December 30, 2015. REUTERS/Media Coulibaly 

South African peacekeepers patrol the streets of Goma in eastern Democratic Republic of Congo, December 2, 2015. Christmas came early on Wednesday with hampers, gifts and praise from their political masters for hundreds of South African peacekeepers in Democratic Republic of Congo struggling to make an impact in the face of its chaotic and confusing politics. REUTERS/Ed Cropley 

South African peacekeepers patrol the streets of Goma in eastern Democratic Republic of Congo, December 2, 2015. Christmas came early on Wednesday with hampers, gifts and praise from their political masters for hundreds of South African peacekeepers in Democratic Republic of Congo struggling to make an impact in the face of its chaotic and confusing politics. REUTERS/Ed Cropley 

South African peacekeepers patrol the streets of Goma in eastern Democratic Republic of Congo, December 2, 2015. Christmas came early on Wednesday with hampers, gifts and praise from their political masters for hundreds of South African peacekeepers in Democratic Republic of Congo struggling to make an impact in the face of its chaotic and confusing politics. REUTERS/Ed Cropley 

U.N peacekeepers of the United Nations Interim Force in Lebanon (UNIFIL) wear face masks while they monitor the Lebanese-Israeli border during a sandstorm in Kfar Kila village, in south Lebanon September 8, 2015. A heavy sandstorm swept across parts of the Middle East on Tuesday, hospitalising scores of people in Lebanon and disrupting air strikes and fighting in neighbouring Syria. Clouds of dust also engulfed Israel, Jordan and Cyprus where aircraft were diverted to Paphos from Larnaca airport as visibility fell to 500 metres. REUTERS/Aziz Taher 

U.N peacekeepers of the United Nations Interim Force in Lebanon (UNIFIL) wear face masks while they monitor the Lebanese-Israeli border during a sandstorm in Kfar Kila village, in south Lebanon September 8, 2015. A heavy sandstorm swept across parts of the Middle East on Tuesday, hospitalising scores of people in Lebanon and disrupting air strikes and fighting in neighbouring Syria. Clouds of dust also engulfed Israel, Jordan and Cyprus where aircraft were diverted to Paphos from Larnaca airport as visibility fell to 500 metres. REUTERS/Aziz Taher 

U.N peacekeepers of the United Nations Interim Force in Lebanon (UNIFIL) wear face masks while they ride a vehicle near the Lebanese-Israeli border during a sandstorm in Kfar Kila village, in south Lebanon September 8, 2015. A heavy sandstorm swept across parts of the Middle East on Tuesday, hospitalising scores of people in Lebanon and disrupting air strikes and fighting in neighbouring Syria. Clouds of dust also engulfed Israel, Jordan and Cyprus where aircraft were diverted to Paphos from Larnaca airport as visibility fell to 500 metres. REUTERS/Aziz Taher 

A UN mine disposal expert from Cambodia walks while holding a mine detector during a media tour in the UN-controlled buffer zone near the village of Mammari, Cyprus August 26, 2015. REUTERS/Yiannis Kourtoglou 

A UN mine disposal expert from Cambodia demonstrates de-mining techniques during a media tour in the UN-controlled buffer zone near the village of Mammari, Cyprus August 26, 2015. REUTERS/Yiannis Kourtoglou 

UN mine disposal experts from Cambodia demonstrate de-mining techniques during a media tour in the UN-controlled buffer zone near the village of Mammari, Cyprus August 26, 2015. REUTERS/Yiannis Kourtoglou

UN peacekeepers patrol in Kidal, Mali, July 23, 2015. REUTERS/Adama Diarra 

A Guinean soldier stands guard at the Minusma peacekeeping base in Kidal, Mali, July 22, 2015. Picture taken July 22, 2015. REUTERS/Adama Diarra 

Fijian U.N. peacekeepers released by al-Qaeda-linked group Nusra Front in Syria on Thursday, gesture from inside a vehicle as they arrive in Israeli-held territory on the Golan heights September 11, 2014. The peacekeepers were taken hostage two weeks ago when several Islamist militant groups including Nusra attacked in the volatile frontier between Syria and Israel. REUTERS/Baz Ratner (POLITICS CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY) 

A U.N. convoy of soldiers passes a screen displaying a message on Ebola on a street in Abidjan August 14, 2014. The world's worst outbreak of Ebola has claimed the lives of 1,069 people and there are 1,975 probable and suspected cases, the vast majority in Guinea, Liberia and Sierra Leone, according to new figures from the World Health Organisation (WHO). Ivory Coast has recorded no cases of Ebola. REUTERS/Luc Gnago (IVORY COAST - Tags: HEALTH TRANSPORT TPX IMAGES OF THE DAY) 

Women walk towards a U.N. peacekeeper patrolling in Bentiu, Unity State, June 18, 2014. Around 39,000 people have found shelter at the U.N. base in Bentiu. About 1.5 million people have been displaced, including 378,000 who fled to neighbouring countries according to the Office for the Coordination of Humanitarian Affairs (OCHA). REUTERS/Andreea Campeanu (SOUTH SUDAN - Tags: CIVIL UNREST TPX IMAGES OF THE DAY POLITICS) 

Kazakh troops march during a parade of the armed forces to mark the Defender of the Fatherland Day in Astana, May 7, 2014. REUTERS/Mukhtar Kholdorbekov (KAZAKHSTAN - Tags: MILITARY ANNIVERSARY) 

A United Nations (U.N.) peacekeeping soldier stands on an observation tower near the Quneitra border crossing between Israel and Syria, in the Israeli-occupied Golan Heights August 31, 2013. The United Nations team tasked with investigating alleged chemical weapons strikes in Syria arrived in Lebanon on Saturday, a Reuters witness said, after leaving their Damascus hotel. REUTERS/Ronen Zvulun (MILITARY SOCIETY POLITICS) 

U.N. peacekeepers drive their tank as they patrol past the deserted Kibati village near Goma in the eastern Democratic Republic of Congo, August 7, 2013. A 17,000-strong U.N. force, known as MONUSCO, and Congo troops have struggled over the past decade to stem a conflict involving dozens of armed groups and complicated by national and ethnic rivalries. A new 3,000-member U.N. Intervention Brigade was recently deployed to fight and disarm rebels in the east. REUTERS/Thomas Mukoya (DEMOCRATIC REPUBLIC OF CONGO - Tags: SOCIETY CIVIL UNREST MILITARY POLITICS) 

A UN peacekeeper from Burkina Faso stands guard at the Djinguereber mosque, built in the 14th century, during a visit by a UN delegation on election day in Timbuktu, Mali, July 28, 2013. REUTERS/Joe Penney (MALI - Tags: ELECTIONS POLITICS MILITARY) 

A United Nations peacekeeper speaks to a man during a protest against sending peacekeepers from Senegal to the northern rebel-held town of Kidal before sending Malian soldiers there, in Gao July 5, 2013. About 500 people from different youth organizations rallied in front of the camp where Senegalese peacekeepers for the UN mission in Mali, MINUSMA, are stationed on Friday. REUTERS/Malin Palm (MALI - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY) 

Burkinabe soldiers, part of the MISMA African forces in Mali, receive blue berets to signify the change of mission command to the UN in Timbuktu June 30, 2013. The 12,000-strong U.N. peacekeeping mission in Mali, MINUSMA, is due to start on July 1. REUTERS/Adama Diarra (MALI - Tags: POLITICS MILITARY) 

A United Nations peacekeeper stands on an observation tower at the Kuneitra border crossing between Israel and Syria, in the Israeli occupied Golan Heights March 8, 2013. Israel voiced confidence on Thursday that the United Nations could secure the release of U.N. peacekeepers seized by Syrian rebels near the Golan Heights on Wednesday, signalling it would not intervene in the crisis. Israel captured the Golan Heights in the 1967 Middle East war and annexed it in 1981 in a move not recognized internationally. REUTERS/Baz Ratner (POLITICS) 

Helmets belonging to soldiers of the Nigerian army are seen as part of preparations for deployment to Mali, at the Nigerian Army peacekeeping centre in Jaji, near Kaduna January 17, 2013. French troops launched their first ground assault against Islamist rebels in Mali on Wednesday in a broadening of their operation against battle-hardened al Qaeda-linked fighters who have resisted six days of air strikes. West African military chiefs said the French would soon be supported by around 2,000 troops from Nigeria, Chad, Niger and other regional powers - part a U.N.-mandated deployment which had been expected to start in September but was kick-started by the French intervention. REUTERS/Afolabi Sotunde (NIGERIA - Tags: POLITICS CIVIL UNREST MILITARY) 

Members of the United Nations observers mission in Syria, who have left their bases in the province of Homs in Central Syria, push a trolley with their luggage in a hotel in Damascus August 20, 2012. United Nations military observers left Damascus on Monday after a four-month mission in which they became helpless spectators of Syria's spiralling conflict, instead of monitoring a ceasefire between President Bashar al-Assad's forces and rebels. The mandate of the monitoring mission, known as UNSMIS, expired on Sunday night after diplomats at the United Nations said conditions for continuing operations had not been met. The last monitors are expected to be out of the country by Friday. REUTERS/Khaled al-Hariri (SYRIA - Tags: CIVIL UNREST MILITARY POLITICS) 

A UN peacekeeping patrol drives through the eastern Congolese city of Goma, July 23, 2012. More than 200,000 civilians have had to leave their homes and several hundred fighters have been killed in recent clashes between M23 rebels and the Congolese government. Reports of support for rebel fighters from neighbouring Rwanda have stoked fears of a slide into broader central African conflict although countries in the region last week agreed a plan to eradicate armed groups in eastern Congo. REUTERS/James Akena (DEMOCRATIC REPUBLIC OF CONGO - Tags: CIVIL UNREST POLITICS CONFLICT) 

United Nations peacekeeping engineers from the Japanese Ground Self-Defence Force (GSDF) poses for a photo with a child inside the Confident Children out of Conflict (CCC) Centre for girls in the Juba capital of South Sudan April 1, 2012. REUTERS/ Mohamed Nureldin Abdallah (South Sudan - Tags: POLITICS SOCIETY) 

Opposition leader Winston Tubman (R) of the Congress for Democratic Change (CDC) is comforted by a friend after riot police fired tear gas and live rounds into his party headquarters, killing at least one person, in the capital Monrovia, November 7, 2011. Liberian police later stormed the headquarters of presidential challenger Tubman before being repelled by United Nations peacekeepers, who have set up a cordon around the building, a Reuters journalist at the scene said. REUTERS/Finbarr O'Reilly (LIBERIA - Tags: POLITICS CIVIL UNREST CRIME LAW ELECTIONS) 

A Nigerian United Nations peacekeeper stands guard at a rally for incumbent Liberian President Ellen Johnson-Sirleaf in Monrovia November 6, 2011. Johnson-Sirleaf urged voters on Saturday to ignore a poll boycott called for by her rival, saying the move was illegal and intended to intimidate Liberians. REUTERS/Finbarr O'Reilly (LIBERIA - Tags: POLITICS CIVIL UNREST ELECTIONS MILITARY) 

A wounded French U.N. peacekeeper stands near a damaged U.N. vehicle in the port city of Sidon in south Lebanon July 26, 2011. A roadside bomb blew up a United Nations vehicle near Sidon on Tuesday, wounding five French peacekeepers. REUTERS/ Ali Hashisho (LEBANON - Tags: POLITICS MILITARY CIVIL UNREST) 

A Ugandan peacekeeper from the African Union Mission to Somalia (AMISOM) takes a rest during fighting between Somalia government soldiers and Islamist insurgents near the main Bakara market in the capital Mogadishu, May 21, 2011. REUTERS/Feisal Omar (SOMALIA - Tags: SOCIETY CIVIL UNREST MILITARY IMAGES OF THE DAY) 

Wooden statues replicating UN military troops line a table on a roadside stand in Port-au-Prince in this May 11, 2011 picture. Musician Michel "Sweet Micky" Martelly swept into the presidency by wooing Haiti's mostly poor and uneducated electorate with a potent promise of change. Picture taken May 11, 2011. To match Newsmaker HAITI/MARTELLY. REUTERS/Swoan Parker (HAITI - Tags: POLITICS MILITARY) 

U.N. peacekeeper soldiers patrol in front the National palace in Port au Prince March 19, 2011. Haiti's presidential run-off election between Michel Martelly and the former first lady Mirlande Manigat will be held on Sunday. REUTERS/Kena Betancur (HAITI - Tags: POLITICS ELECTIONS MILITARY) 

Bangladeshi UN soldiers sit on top of armoured vehicles during a patrol in Abidjan January 9, 2011. Ivory Coast has been in turmoil since a Nov. 28 election in which both incumbent Laurent Gbagbo and his rival Alassane Ouattara claimed victory. World leaders have recognised Ouattara as winner and West African regional bloc ECOWAS has threatened Gbagbo with an intervention. REUTERS/Luc Gnago (IVORY COAST - Tags: MILITARY POLITICS) 

HAITI-CHOLERA/UN - Map of Haiti indicating provinces worst affected by cholera cases. Locates recent attacks on UN peacekeepers and details the UN force in Haiti. RNGS. (SIN03) 

Haitians talk to a United Nations soldier from Chile in Cap Haitien July 26, 2010. REUTERS/Eduardo Munoz (HAITI - Tags : RELIGION SOCIETY) 

A UN peacekeeper from Brazil patrols a street in Port-au-prince January 19, 2010. REUTERS/Bruno Domingos (HAITI - Tags: DISASTER ENVIRONMENT) 

A line of soldiers guards a crowd of local people coming to get humanitarian aid in Port-au-Prince, January 18, 2010. The pace of food and medical aid deliveries picked up in earthquake-shattered Haiti, providing some hope to desperate survivors, but doctors worried disease would be the next big challenge for the tens of thousands left injured and homeless a week ago. Picture taken Janaury 18, 2010. REUTERS/Tatyana Makeyeva (HAITI - Tags: DISASTER MILITARY SOCIETY) 

U.N personnel prepare to distribute water at the airport in Port-au-Prince January 16, 2010. Haitian earthquake survivors fought over food and water and others fled their wrecked capital on Saturday as the United States rolled out what President Barack Obama called one of its largest relief efforts ever. REUTERS/Eduardo Munoz (HAITI - Tags: DISASTER ENVIRONMENT) 

Italian U.N. peacekeepers stand at attention during the visit of Italy's President Giorgio Napolitano to the Italian United Nations Interim Forces (UNIFIL) base in Shamaa village, southern Lebanon November 3, 2009. REUTERS/Ali Hashisho (LEBANON POLITICS MILITARY ANIMALS) 

A U.N. peacekeeper from Italy stands during manoeuvres in Naqoura harbour, southern Lebanon, October 26, 2009. U.N. peacekeepers serving with the United Nations Interim Force in Lebanon (UNIFIL) and Lebanese armed forces conducted a joint exercise aimed at testing command control procedures securing the coastline both on land and at sea. REUTERS/Ali Hashisho (LEBANON MILITARY) 

U.N. peacekeepers from Italy board a vessel during an anti-smuggling drill near Naqoura harbour, southern Lebanon, October 26, 2009. U.N. peacekeepers serving with the United Nations Interim Force in Lebanon (UNIFIL) and Lebanese armed forces conducted a joint exercise aimed at testing command control procedures securing the coastline both on land and at sea. REUTERS/Ali Hashisho (LEBANON MILITARY IMAGES OF THE DAY) 

A French peacekeeper of the United Nations Interim Force in Lebanon (UNIFIL) force helps a member of the bomb disposal unit put on his protective suit during military exercises to mark Bastille Day in the French UNIFIL base in Tiri village, southern Lebanon, July 13, 2009, as a remotely operated vehicle commonly deployed against improvised explosive devices (IEDs) is seen in the foreground. Bastille Day is celebrated by the French on July 14. REUTERS/Ali Hashisho (LEBANON) 

Residents assist a woman after she inhaled tear gas as United Nations' peacekeepers look on during clashes with university students protesting curriculum changes in Port-au-Prince, June 4, 2009. REUTERS/St. Felix Evens (HAITI POLITICS EDUCATION CONFLICT) 

A United Nations' peacekeeper carries a student after she inhaled tear gas during clashes with university students protesting curriculum changes in Port-au-Prince, June 4, 2009. REUTERS/St. Felix Evens (HAITI POLITICS EDUCATION CONFLICT) 

A U.N. peacekeeper soldier stands guard in a polling station during senate elections in Port-au-Prince April 19, 2009. REUTERS/ St Felix Evens (HAITI POLITICS ELECTIONS) 

Spanish UN peacekeepers break painted eggs with children after Easter prayers infront of a church in Qlayaa village in southern Lebanon April 12, 2009. REUTERS/ Karamallah Daher (LEBANON RELIGION) 

A Nigerian peacekeeping soldier from the United Nations-African Union Mission in Darfur (UNAMID) patrols in Otash IDP's camp in Nyla, southern Darfur March 17,2009. Law and order have collapsed in Darfur where international experts say at least 200,000 people have been killed, while Khartoum says 10,000 have died. The undermanned peacekeeping force has found itself caught in the middle of an increasingly chaotic conflict involving bandits, rival tribes, government militias and rebels. REUTERS/Zohra Bensemra (SUDAN POLITICS CONFLICT SOCIETY IMAGE OF THE DAY TOP PICTURE) 

A displaced Sudanese girl looks at a peacekeeping soldier from the United Nations African Union Mission in Darfur (UNAMID) at Abu Shouk IDP camp in Al Fasher, northern Darfur, March 16, 2009. REUTERS/Zohra Bensemra (SUDAN POLITICS CONFLICT)