A demonstrator breaks the windshield of a truck that belongs to a subway maintenance crew after clashes with police broke out during a general strike in Rio de Janeiro, Brazil, Friday, April 28, 2017. Public transport largely came to a halt across much of Brazil on Friday and protesters blocked roads and scuffled with police as part of a general strike to protest proposed changes to labor laws and the pension system. (Photo by Leo Correo/AP Photo)





Britain' s Anthony Joshua (R) throws a punch at Ukraine' s Wladimir Klitschko during the ninth round of their IBF, IBO and WBA, world Heavyweight title fight at Wembley Stadium in north west London on April 29, 2017. (Photo by Andrew Couldridge/Reuters)





Michele de Oliveira reacts during the funeral of her son Paulo Henrique de Oliveira,13, shot dead during a shootout between drug dealers and police, in Alemao slums complex in Rio de Janeiro, Brazil, April 26, 2017. (Photo by Ricardo Moraes/Reuters)





Residents look a the damages on the main street of Coligny, on April 26, 2017. The shops on the main street of the North Western Province town of Coligny were ransacked during a night of violence that erupted after a child from a nearby township died in unclear circumstances highlighting racial tensions in the area. (Photo by Marco Longari/AFP Photo)





Medical students from Chulalongkorn University take part in a religious ceremony to pay respects to cadavers used during their medical studies before the bodies are removed from Chulalongkorn Hospital in Bangkok, Thailand, April 26, 2017. (Photo by Athit Perawongmetha/Reuters)





A Cameroonian United Nations peacekeeping soldier guards women fleeing the village of Zike as they arrive to the village of Bambara, Central African Republic, April 25, 2017. (Photo by Baz Ratner/Reuters)





An armed fighter belonging to the 3R armed militia displays his weapon in the town of Koui, Central African Republic, April 27, 2017. (Photo by Baz Ratner/Reuters)





Locals clean up after over-night looting, when protesters took to the streets to demonstrate the killing of a boy in Coligny, North West province, South Africa, April 26, 2017. (Photo by Siphiwe Sibeko/Reuters)





A model, painted by the artist Avi Ram from Airbrush Hero, poses for a photo as part of a calendar project, at the Tower of David in Jerusalem's Old City, April 27, 2017. (Photo by Ronen Zvulun/Reuters)





A man works inside a Christian souvenir shop ahead of Pope Francis’ visit in Cairo, Egypt April 27, 2017. (Photo by Amr Abdallah Dalsh/Reuters)





A Brazilian Indian takes part in a demonstration against the violation of indigenous people's rights, in Brasilia, Brazil April 27, 2017. (Photo by Ueslei Marcelino/Reuters)





Buses burn during clashes between demonstrators and riot police in a protest against President Michel Temer's proposed reform of Brazil's social security system, in Rio de Janeiro, Brazil, April 28, 2017. (Photo by Ricardo Moraes/Reuters)





Workers and wine growers light heaters early in the morning, to protect vineyards from frost damage outside Chablis, France April 28, 2017. (Photo by Christian Hartmann/Reuters)





The Atlantica SuperSplash of MACK Rides is pictured at the theme park EUROPA PARK in Rust near Freiburg, Germany April 28, 2017. (Photo by Ralph Orlowski/Reuters)





A street artist performs with soap bubbles at Rossio square in downtown Lisbon, Portugal April 28, 2017. (Photo by Rafael Marchante/Reuters)





A car drives along the M54 federal highway as smoke rises from burning grass and forest fire, south of Krasnoyarsk, Russia, April 28, 2017. (Photo by Ilya Naymushin/Reuters)





U.S. first lady Melania Trump holds a gift of a picture made by children at the opening of Bunny Mellon Healing Garden at Children's National Medical Center in Washington, U.S, April 28, 2017. (Photo by Yuri Gripas/Reuters)





Dairy cows are released into open fields for the lush summer pastures, freed from the stables which have been their homes for the long winter months, in Drottningholm, Sweden, Saturday, April 29, 2017. The annual event, known in Sweden as “koslapp” or cow release, has become a popular family outing for many urban dwellers. (Photo by David Keyton/AP Photo)





People walk past a TV news showing an image of North Korean leader Kim Jong Un while reporting North Korea's missile test, in Tokyo, Saturday, April 29, 2017. A North Korean mid-range ballistic missile apparently failed shortly after launch Saturday, South Korea and the United States said, the third test-fire flop just this month but a clear message of defiance as a U.S. supercarrier conducts drills in nearby waters. (Photo by Koji Sasahara/AP Photo)





Pro-Kremlin political activist Maria Katasonova, wearing a T-shirt with a portrait of president Vladimir Putin, arrives to meet with opposition activist Maria Baronova before an unsanctioned protest in downtown Moscow, Russia, Saturday, April 29, 2017. Several hundred demonstrators are gathered in central Moscow, trying to move to the nearby presidential administration building to present letters calling on Vladimir Putin not to run for a fourth term in office in 2018. (Photo by Alexander Zemlianichenko/AP Photo)





Pope Francis waves as he arrives to celebrate Mass for Egypt's tiny Catholic community, at the Air Defense Stadium in Cairo, Saturday, April 29, 2017. Pope Francis came to Egypt on Friday for a historic visit to the Arab and Muslim majority nation aimed at presenting a united Christian-Muslim front to repudiate violence committed in God's name. (Photo by Gregorio Borgia/AP Photo)





A biker with family members in the side car takes part in a convoy of about thousands of others in Diebach am Haag, Germany, on Sunday, April 23, 2017. The convoy followed a Mass marking the opening of the biker season. (Photo by Michael Probst/AP Photo)