A man stands in a building earmarked for demolition in the Mathare neighbourhood of Nairobi, Kenya, May 17, 2016. Kenya's authorities tore down a badly built residential block in the poor Nairobi district on Tuesday, one of more than 250 shoddy buildings that could now face demolition after a six-story structure collapsed this month killing 51 people. (Photo by Goran Tomasevic/Reuters)





Women shout slogans during a protest against Brazil's interim President Michel Temer and in support of suspended President Dilma Rousseff at Paulista Avenue in Sao Paulo, Brazil, May 17, 2016. (Photo by Nacho Doce/Reuters)





A woman waits in line to see Democratic presidential candidate Bernie Sanders in Carson, California, U.S., May 17, 2016. (Photo by Lucy Nicholson/Reuters)





A protestor against visiting Zhang Dejiang, the chairman of China's National People's Congress, confronts police in Hong Kong May 18, 2016. (Photo by Paul Yeung/Reuters)





Chile's government house is illuminated with rainbow colours to mark International Day Against Homophobia in Santiago, Chile, May 17, 2016. (Photo by Ivan Alvarado/Reuters)





Young chickens dyed to draw attention are offered for sale at a small poultry market in Jakarta, Indonesia May 18, 2016. (Photo by Darren Whiteside/Reuters)





Young chickens, some of them dyed, are offered for sale at a small poultry market in Jakarta, Indonesia May 18, 2016. (Photo by Darren Whiteside/Reuters)





German Head of the Federal Chancellery Peter Altmaier puts on his jacket during a cabinet meeting at the Chancellery in Berlin, Germany, May 18, 2016. (Photo by Fabrizio Bensch/Reuters)





A participant dressed in a traditional costume walks during a rehearsal of a performance for the inauguration ceremony of President-elect Tsai Ing-wen, in Taipei, Taiwan May 18, 2016. (Photo by Tyrone Siu/Reuters)





Giant human-shaped balloons are seen during a rehearsal of a performance for the inauguration ceremony of President-elect Tsai Ing-wen, in Taipei, Taiwan May 18, 2016. (Photo by Tyrone Siu/Reuters)





Participants dressed in traditional costumes take part of a rehearsal of a performance for the inauguration ceremony of President-elect Tsai Ing-wen, in Taipei, Taiwan May 18, 2016. (Photo by Tyrone Siu/Reuters)





A police car burns during a demonstration against police violence and against French labour law reform in Paris, France, May 18, 2016. (Photo by Charles Platiau/Reuters)





Firefighters work on a police car set up on fire by counter demonstrators while police forces gather to denounce the almost daily violent clashes at protests against a labor reform, Wednesday, May 18, 2016 in Paris. Several hundred counter demonstrators came chanting slogans like “everybody hates the police” and pushing up against officers until eventually the police deployed dispersal spray. (Photo by Francois Mori/AP Photo)





Soldiers stand in heavy rain as Britain's Queen Elizabeth II travels in a carriage from Buckingham Palace towards the Houses of Parliament in London, Wednesday, May 18, 2016. The State Opening of Parliament marks the formal start of the parliamentary year and the Queen's Speech sets out the government's agenda for the coming session. (Photo by Frank Augstein/AP Photo)





Yeoman warders take part in the traditional "ceremonial search" in the Prince's chamber in the houses of Parliament before the Queen's Speech during the State Opening of Parliament, at the Palace of Westminster in London, Britain May 18, 2016. (Photo by Alastair Grant/Reuters)





Cast member Adele Haenel attends a news conference for the film “La fille inconnue” (The Unknown Girl) in competition at the 69th Cannes Film Festival in Cannes, France, May 18, 2016. (Photo by Jean-Paul Pelissier/Reuters)





Belgium's King Philippe and Jordan's Queen Rania take part in a gala dinner at the Royal Castle of Laken in Brussels, Belgium, May 18, 2016. (Photo by Eric Vidal/Reuters)





Children and actors participate in a performance during the anniversary celebrations of Haiti's National flag day in Arcahaie, Haiti, May 18, 2016. (Photo by Andres Martinez Casares/Reuters)





Haitian youths are pictured during celebrations for celebrate Haiti's national flag day in the streets of Arcahaie, Haiti, May 18, 2016. (Photo by Andres Martinez Casares/Reuters)





The new E version of the Swedish JAS 39 Gripen multi role fighter being rolled out at SAAB in Linkoping, Sweden, Wednesday, May 18, 2016. Swedish aircraft maker Saab has unveiled the latest version of its Gripen fighter jet. The E fighter is slightly bigger than previous versions, has a stronger engine and updated radar systems. It has been in development for about 10 years. The first test flight is expected later this year. (Photo by Anders Wiklund/TT via AP Photo)





In this Saturday, April 23, 2016 photo, Eritrean Christian Orthodox migrant women attend a mass at a makeshift church in Tel Aviv, Israel. Hundreds of faithful gather each week in the makeshift churches. With its walls bedecked with Christian paraphernalia, it is an unlikely scene in the heart of the Jewish state, hidden in a non-descript buildings in hardscrabble south Tel Aviv. (Photo by Oded Balilty/AP Photo)





Protestors use an improvised slingshot to launch balloons filled with colored paint at the Parliament building, during a protest dubbed the “Colorful Revolution” against Macedonian President George Ivanov's decision on wiretapping amnesty, in Skopje, The Former Yogoslav Republic of Macedonia, 17 May 2016. Daily protests in Macedonia have been ongoing for almost three weeks, after the President's decision to pardon dozens of politicians who were involved in a wiretapping scandal. (Photo by Georgi Licovski/EPA)





This Monday, May 16, 2016 photo, shows a dust storm on Interstate 10 near San Simon, Ariz. State officials say the owner of a farm that was cleared but not planted will face fines if the owner doesn't act to contain the soil, which is loose and easily picked up by winds. A dry winter means the Southwest is seeing a greater number of dust storms. (Photo by Arizona Department of Public Safety via AP Photo)





An overloaded car travels through the Assaga refugee camp in Diffa on May 17, 2016, close to the Niger-Nigeria border. Chief of Humanitarian Operations of the UN, Stephen O'Brien, vowed on May 17 to raise funds at the next World Humanitarian Summit for “significant” help to the more than 240,000 refugees displaced by Boko Haram in camps in south-east Niger. (Photo by Boureima Hama/AFP Photo)





In this April 25, 2016 photo, a girl from the community who call themselves the “Muhammasheen”, or “the Marginalized”, peers through a curtain of her hut, in a slum area of Sanaa, Yemen. They are Yemen's untouchables, a dark-skinned ethnic group that for centuries has been consigned to the bottom of Yemen's social scale, faced with discrimination and racism, and shunned by others. Vulnerable with no tribal protection, they have been hit particularly hard in Yemen's civil war. (Photo by Hani Mohammed/AP Photo)





In this May 2, 2016 photo, researchers watch a six-foot-tall, 300-pound Valkyrie robot walk slowly at University of Massachusetts-Lowell's robotics center in Lowell, Mass. “Val”, one of four sister robots built by NASA, could be the vanguard for the colonization of Mars by helping to set up a habitat for future human explorers. NASA spokesman Jay Bolden says the agency aims to get to Mars by 2035 and it'll be the Valkyries or their descendants paving the way. (Photo by Elise Amendola/AP Photo)





A photograph made available on 18 May 2016 shows substitutes reacting after their team-mates scored a goal during the first school football tournament, in the rebel-held city of Douma, Syria, 20 April 2016. Twelve teams took part in the first school football tournament that started on 16 April 2016. Ten days later the tournament was postponed after the fragile ceasefire between the government and rebel groups was breached by a wave of violence and several parts of Eastern Ghouta were targeted by government shelling. The final match was held on 14 May and al-Hekma school team snatched the title after beating al-Rowad school. (Photo by Mohammed Badra/EPA)





Life-size models of two Triceratops are on display in a park of prehistoric animals following its opening on the premises of the Veszprem Zoo in Veszprem, 108 kms southwest of Budapest, Hungary, 18 May 2018. There are 30 models of various types of dinosaurs, among them a 23-metre long Diplodocus and a 4-metre high Tyrannosaurus rex, shown in the two-hectare park, home of the largest exhibition of prehitoric animals in Hungary. (Photo by Boglarka Bodnar/EPA)





A Sri Lankan landslide survivor caries her dog as she walks on the mud after a landslide in Elangipitiya village in Aranayaka about 72 kilometers (45 miles) north east of Colombo, Sri Lanka, Wednesday, May 18, 2016. Soldiers and police used sticks and bare hands Wednesday to dig through enormous piles of mud covering houses in three villages hit by massive landslides in central Sri Lanka, with hundreds of families reported missing. (Photo by Eranga Jayawardena/AP Photo)





An officer reviews members of the honor guard as they line up before a welcoming ceremony for visiting Mozambique's President Filipe Jacinto Nyusi at the Great Hall of the People in Beijing, Wednesday, May 18, 2016. (Photo by Mark Schiefelbein/AP Photo)