U.S. forces unload supplies from a Marines helicopter after Hurricane Matthew in Les Anglais, Haiti, October 11, 2016. REUTERS/Andres Martinez Casares 

U.S. forces unload supplies from a Marines helicopter after Hurricane Matthew in Les Anglais, Haiti, October 11, 2016. REUTERS/Andres Martinez Casares 

U.S. forces unload supplies from a Marines helicopter after Hurricane Matthew in Les Anglais, Haiti, October 11, 2016. REUTERS/Andres Martinez Casares 

U.S. forces unload supplies from a Marines helicopter after Hurricane Matthew in Les Anglais, Haiti, October 11, 2016. REUTERS/Andres Martinez Casares

Britain Soccer Football - West Ham United v Middlesbrough - Premier League - London Stadium - 1/10/16
West Ham fan outside the ground before the match
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A sleeping bag hangs on a fence after the evacuation of refugees and migrants from a makeshift camp at the Greek-Macedonian border near the village of Idomeni, Greece, August 10, 2016. REUTERS/Alexandros Avramidis

A worker helps his colleague carry sacks of red onions which they deliver to a warehouse in Metro Manila, Philippines July 4, 2016. REUTERS/Romeo Ranoco

A worker hauls a rack full of sacks of white onions to be delivered to a wet market in Metro Manila, Philippines July 4, 2016. REUTERS/Romeo Ranoco

A worker stands on top of piles of red onion sacks as he prepares to deliver the produce to a warehouse in metro Manila, Philippines July 4, 2016. REUTERS/Romeo Ranoco

A worker carries sacks of red onions on his shoulder to be delivered a warehouse in Metro Manila, Philippines July 4, 2016. REUTERS/Romeo Ranoco

Internally displaced people receive assistance from African Muslim Agency near Adbuqadir town of Awdal region, Somaliland April 11, 2016. Across the Horn of Africa, millions have been hit by the severe El Nino-related drought. In Somaliland and its neighbouring, also semi-autonomous, Puntland region, 1.7 million people are in need of aid, according to the United Nations. In Somaliland itself, the most affected areas include the northwest Awdal region bordering Ethiopia. REUTERS/Feisal Omar SEARCH "DROUGHT SURVIVAL" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES 

A man rests on sacks of discarded clothes at a slum in Mumbai, India, April 20, 2016. REUTERS/Danish Siddiqui 

Children play on sacks of discarded clothes at a slum in Mumbai, India, April 20, 2016. REUTERS/Danish Siddiqui 

A girl sits on a sack of discarded clothes at a slum in Mumbai, India, April 20, 2016. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY

A man carrying a sack walks past a damaged vehicle as members ofTurkish police special forces (L) look at him in Baglar district, which is partially under curfew, in the Kurdish-dominated southeastern city of Diyarbakir, Turkey March 15, 2016. REUTERS/Sertac Kayar 

Residents, with the members of Turkish police special forces in the background, flee after clashes between security forces and Kurdish militants from Baglar district, which is partially under curfew, in the Kurdish-dominated southeastern city of Diyarbakir, Turkey March 15, 2016. REUTERS/Sertac Kayar 

Afghan security forces take their positions at the hilltop of Dand Ghori district of Baghlan province, Afghanistan March 15, 2016. REUTERS/Omar Sobhani

A worker closes a warehouse of lithium carbonate processed from the Rockwood Lithium mine on the Atacama salt flat, the largest lithium deposit currently in production, in Antofagasta, northern Chile January 14, 2013. Far from the soy and cattle that dominate its vast fertile pampas, Argentina harbors another valuable commodity that is rocketing in price and demand and luring newly welcomed foreign investors. Lithium, the so-called "white petroleum", drives much of the modern world. It forms a small but essentially irreplaceable component of rechargeable batteries, used in consumer devices like mobile phones and electric cars. It also has pharmaceutical and other applications. Picture taken January 14, 2013. REUTERS/Ivan Alvarado 

A man walks past a truck loaded with animal food at the cattle market in Maiduguri, Nigeria March 9, 2016. A Nigerian government push to strangle the Boko Haram insurgency has shut down the cattle trade that sustained the city of Maiduguri, leaving many residents with no livelihood, including many of the two million people displaced by the war. In recent months the army has taken back much of the territory lost to the jihadists during the five-year insurgency. REUTERS/Afolabi Sotunde SEARCH "BOKO CATTLE" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES

A rebel fighter from Jaysh al-Sunna aims his weapon while searching for a sniper in Mkahaleh village, in the southern countryside of Aleppo, Syria March 14, 2016. REUTERS/Khalil Ashawi 

Workers unload cement bags from a truck near the construction site of residential buildings in New Delhi, India, March 10, 2016. REUTERS/Anindito Mukherjee 

A migrant drags firewood at a makeshift camp on the Greek-Macedonian border, near the village of Idomeni, Greece March 9, 2016. REUTERS/Stoyan Nenov

A migrant is reflected in the mud as he carries a sack with his belongings in a refugee camp in Grande-Synthe, near Dunkerque, northern France, March 7, 2016. REUTERS/Pascal Rossignol 

An indigenous Sahrawi woman divides her donated flour into parts at a refugee camp of Boudjdour in Tindouf, southern Algeria March 3, 2016. The UN Secretary-General Ban Ki-moon is scheduled to visit the Sahrawi refugees in south-west Algeria's Tindouf region. REUTERS/Zohra Bensemra 

Sacks of rotten rice are pictured at a warehouse in Nakhon Pathom province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

A soldier watches as workers load sacks of rotten rice at a warehouse in Nakhon Pathom province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

A soldier stands next to sacks of rotten rice at a warehouse in Nakhon Pathom province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

A worker loads a sack of rotten rice on a truck at a warehouse in Nakhon Pathom province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

Workers load sacks of rotten rice onto a truck at a warehouse in Nakhon Pathom province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

A worker sits next to sacks of rotten rice at a warehouse in Nakhon Pathom province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

A worker carries a sack of rotten rice at a warehouse in Nakhon Pathom province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

Workers unload sacks of rotten rice at a fertilizer warehouse in Ratchaburi province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

A worker watches as sacks of rotten rice are unloaded at a fertilizer warehouse in Ratchaburi province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

Workers unload sacks of rotten rice as military personnel and government officers observe at a fertiliser warehouse in Ratchaburi province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

Workers unload sacks of rotten rice at a fertilizer warehouse in Ratchaburi province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

A worker loads a sack of rotten rice on a truck at a warehouse in Nakhon Pathom province, Thailand, February 15, 2016. REUTERS/Athit Perawongmetha 

Workers unload products made in Kaesong Industrial Complex (KIC) after returning from KIC near the demilitarized zone separating the two Koreas in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji 

Workers unload products made in Kaesong Industrial Complex (KIC) after returning from KIC near the demilitarized zone separating the two Koreas in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY

Workers unload products made in Kaesong Industrial Complex (KIC) after returning from KIC near the demilitarized zone separating the two Koreas in Paju, South Korea, February 11, 2016. REUTERS/Kim Hong-Ji 

A person dressed as Ziripot, a traditional figure stuffed with straw, walks in front of the figure of Miel Otxin (seen behind with outstretched arms) alongside the Txatxos during carnival celebrations in the Navarran village of Lantz, Spain February 8, 2016. The Ziripot's role as the strongest person in the village is to defeat the evil bandit Miel Otxin, while the Txatxos represent the population of Lantz. REUTERS/Vincent West

Villagers dressed in sacks and holding wooden rakes take part in carnival celebrations in the Navarran village of Lantz, Spain February 8, 2016. The carnival enacts the trial and subsequent burning at the stake of evil bandit Miel Otxin, played out over three days in the village. REUTERS/Vincent West

A Malawian man carries food aid distributed by the United Nations World Food Progamme (WFP) through maize fields in Mzumazi village near the capital Lilongwe, February 3, 2016. Late rains in Malawi threaten the staple maize crop and have pushed prices to record highs. About 14 million people face hunger in Southern Africa because of a drought exacerbated by an El Nino weather pattern, according to the WFP. REUTERS/Mike Hutchings TPX IMAGES OF THE DAY

Malawian women wait with food aid distributed by the United Nations World Food Progamme (WFP) in Mzumazi village near the capital Lilongwe, February 3, 2016. Late rains in Malawi threaten the staple maize crop and have pushed prices to record highs. About 14 million people face hunger in Southern Africa because of a drought exacerbated by an El Nino weather pattern, according to the WFP. REUTERS/Mike Hutchings 

A Malawian man carries food aid distributed by the United Nations World Food Progamme (WFP) in Mzumazi village near the capital Lilongwe, February 3, 2016. Late rains in Malawi threaten the staple maize crop and have pushed prices to record highs. About 14 million people face hunger in Southern Africa because of a drought exacerbated by an El Nino weather pattern, according to the WFP. REUTERS/Mike Hutchings 

A Malawian woman carries food aid distributed by the United Nations World Food Progamme (WFP) in Mzumazi village near the capital Lilongwe, February 3, 2016. Late rains in Malawi threaten the staple maize crop and have pushed prices to record highs. About 14 million people face hunger in Southern Africa because of a drought exacerbated by an El Nino weather pattern, according to the WFP. REUTERS/Mike Hutchings 

A Malawian woman carries food aid distributed by the United Nations World Food Progamme (WFP) in Mzumazi village near the capital Lilongwe, February 3, 2016. Late rains in Malawi threaten the staple maize crop and have pushed prices to record highs. About 14 million people face hunger in Southern Africa because of a drought exacerbated by an El Nino weather pattern, according to the WFP. REUTERS/Mike Hutchings 

Malawians queue for food aid distributed by the United Nations World Food Progamme (WFP) in Mzumazi village near the capital Lilongwe, February 3, 2016. Late rains in Malawi threaten the staple maize crop and have pushed prices to record highs.About 14 million people face hunger in Southern Africa because of a drought exacerbated by an El Nino weather pattern, according to the WFP. REUTERS/Mike Hutchings 

A Malawian woman carries food aid distributed by the United Nations World Food Progamme (WFP) in Mzumazi village near the capital Lilongwe, February 3, 2016. Late rains in Malawi threaten the staple maize crop and have pushed prices to record highs. About 14 million people face hunger in Southern Africa because of a drought exacerbated by an El Nino weather pattern, according to the WFP. REUTERS/Mike Hutchings 

A Malawian man carries food aid distributed by the United Nations World Food Progamme (WFP) in Mzumazi village near the capital Lilongwe, February 3, 2016. Late rains in Malawi threaten the staple maize crop and have pushed prices to record highs.About 14 million people face hunger in Southern Africa because of a drought exacerbated by an El Nino weather pattern, according to the WFP. REUTERS/Mike Hutchings 

A Malawian man carries food aid distributed by the United Nations World Food Progamme (WFP) in Mzumazi village near the capital Lilongwe, February 3, 2016. Late rains in Malawi threaten the staple maize crop and have pushed prices to record highs. About 14 million people face hunger in Southern Africa because of a drought exacerbated by an El Nino weather pattern, according to the WFP. REUTERS/Mike Hutchings 

A worker waits to distribute food aid for the United Nations World Food Progamme (WFP) in Mzumazii village near Malawi's capital Lilongwe, February 3, 2016. Late rains in Malawi threaten the staple maize crop and have pushed prices to record highs. About 14 million people face hunger in Southern Africa because of a drought exacerbated by an El Nino weather pattern, according to the WFP. REUTERS/Mike Hutchings 

A Malawian subsistence farmer carries a bag of fertilizer near the capital Lilongwe, Malawi February 1, 2016. Late rains in Malawi threaten the staple maize crop and have pushed prices to record highs. About 14 million people face hunger in Southern Africa because of a drought that has been exacerbated by an El Nino weather pattern, according to the United Nations World Food Programme (WFP). REUTERS/Mike Hutchings 

Residents wait to receive food aid at a distribution centre in Halo village, a drought-stricken area in Oromia region in Ethiopia, January 31, 2016. Picture taken January 31, 2016. REUTERS/Edmund Blair 

People take part in the "Farinato Race" winter extreme run competition in Gijon, northern Spain, January 31, 2016. REUTERS/Eloy Alonso

People walk away carrying food donation from a temporary centre in the drought stricken Somali region in Ethiopia, January 26, 2016. The drought relief effort in Ethiopia needs about $500 million to fund programmes beyond the end of April to support 10.2 million people facing critical food shortages this year, the U.N. World Food Programme said on Thursday. Picture taken January 26, 2016. REUTERS/Tiksa Negeri 

Palestinian boys demonstrate their parkour skills in Gaza City, January 22, 2016. REUTERS/Mohammed Salem TPX IMAGES OF THE DAY

A boy collects recyclable waste at a rubbish dump outside Yemen's Red Sea port city of Houdieda January 19, 2016. REUTERS/Abduljabbar Zeyad 

A boy carries a bag of recyclable waste at a rubbish dump outside Yemen's Red Sea port city of Houdieda January 19, 2016. REUTERS/Abduljabbar Zeyad 

Boy rests on bags of recyclable waste at a rubbish dump outside Yemen's Red Sea port city of Houdieda January 19, 2016. REUTERS/Abduljabbar Zeyad 

A man carries a bag of recyclable waste at a rubbish dump outside Yemen's Red Sea port city of Houdieda January 19, 2016. REUTERS/Abduljabbar Zeyad