Security agent looks over towards the Carnival Crop.'s Adonia as passengers board before it leaves port in Miami, Sunday, May 1, 2016, en route to Cuba. After a half-century of waiting, passengers finally set sail on Sunday from Miami on an historic cruise to Cuba. Carnival's Cuba cruises, operating under its Fathom band, will visit the ports of Havana, Cienfuegos and Santiago de Cuba. (Photo by Carl Juste/The Miami Herald via AP Photo)





The Acura Stage area is flooded after a storm dumped several inches of rain on the second Saturday of the New Orleans Jazz Fest at the Fair Grounds, Saturday, April 30, 2016. (Photo by David Grunfeld/NOLA.com/The Times-Picayune via AP Photo)





Firefighters stand next an entrance of a subway station set on fire by demonstrators gathered on the Place de la Republique in Paris, France, Sunday, May 1st, 2016. Fearing France's worker protections are under threat, hundreds of angry youths on the sidelines of a May Day labor rally hurled stones and wood at police in Paris, receiving repeated bursts of tear gas in response. (Photo by Kamil Zihnioglu/AP Photo)





An Asian elephant performs during the national anthem for the final time at the Ringling Bros. and Barnum & Bailey Circus, Sunday, May 1, 2016, in Providence, R.I. The circus closes its own chapter on a controversial practice that has entertained audiences since circuses began in America two centuries ago. The animals will live at the Ringling Bros. 200-acre Center for Elephant Conservation in Florida. (Photo by Bill Sikes/AP Photo)





Peruvian presidential candidate Keiko Fujimori of the Fuerza Popular (Popular Force) party rides a bicycle during a campaign rally at Surco district in Lima, Peru April 30, 2016. (Photo by Janine Costa/Reuters)





Children dressed in traditional Ukrainian outfits hold candles during the “holy fire” ceremony on the eve of the Orthodox Easter service, outside the Volodymysky Cathedral in Kiev, Ukraine, April 30, 2016. (Photo by Valentyn Ogirenko/Reuters)





A woman walks among cherry blossom trees during the Sakura Matsuri Festival at the Brooklyn Botanic Garden in the Brooklyn borough of New York, U.S., April 30, 2016. (Photo by Brendan McDermid/Reuters)





Kazakhstan’s President Nursultan Nazarbayev dances with artists during celebrations to mark Kazakhstan People's Unity Day in Almaty, Kazakhstan, May 1, 2016. (Photo by Shamil Zhumatov/Reuters)





People carry their belongings as they leave the Huruma neighbourhood after a a six-storey building collapse after days of heavy rain in Nairobi, Kenya, May 1, 2016. (Photo by Thomas Mukoya/Reuters)





A general view shows rescue workers searching for residents feared trapped in the rubble of a six-storey building that collapsed after days of heavy rain in Nairobi, Kenya, May 1, 2016. (Photo by Thomas Mukoya/Reuters)





A woman carries her belongings as she leaves the Huruma neighbourhood after a six-storey building collapse after days of heavy rain in Nairobi, Kenya, May 1, 2016. (Photo by Thomas Mukoya/Reuters)





A member of the clergy throws petals to welcome the Greek Orthodox Patriarch of Jerusalem Metropolitan Theophilos (not pictured) as they walk towards the Church of the Holy Sepulchre to take part in the Easter Sunday mass procession in Jerusalem's Old City, May 1, 2016. (Photo by Ronen Zvulun/Reuters)





Philippine presidential candidate and Davao city mayor Rodrigo “Digong” Duterte (L) with his vice-presidential candidate senator Alan Peter Cayetano (R) clench fist as they drive past homeless family during their motorcade campaign in Manila, May 1, 2016. (Photo by Romeo Ranoco/Reuters)





A soldier stands at the site of a car bomb attack in a central square in the port city of Aden, Yemen, May 1, 2016, that targeted the city's security chief for the second time in a week. (Photo by Fawaz Salman/Reuters)





Mourners react during a funeral of a victim who was killed in a bomb attack in Samawa, south of Baghdad, Iraq May 1, 2016. (Photo by Alaa Al-Marjani/Reuters)





Formula One, Russian Grand Prix, Sochi, Russia on May 1, 2016: Mercedes staff hold on their hands Mercedes F1 driver Nico Rosberg of Germany as they celebrate victory after the Russian Grand Prix. (Photo by Maxim Shemetov/Reuters)





Police officers stand in front of a tribute to the victims in the departure hall after a ceremony at Brussels Airport as it reopens 40 days after deadly attacks in Zaventem, Belgium, May 1, 2016. (Photo by Eric Vidal/Reuters)





Leicester City fans react during their team's soccer match against Manchester United, as they watch the match on television in the Hogarth's pub in Leicester, Britain May 1, 2016. (Photo by Eddie Keogh/Reuters)





Leicester City fans celebrate in the street after their team's away soccer match against Manchester United, outside Hogarth's pub in Leicester, Britain May 1, 2016. (Photo by Eddie Keogh/Reuters)





Leicester City fans celebrate after their team drew against Manchester United while watching the game on a big screen, in Bangkok, Thailand, May 1, 2016. (Photo by Jorge Silva/Reuters)





Supporters of Peru's presidential candidate Pedro Pablo Kuczynski react in Lima, Peru May 1, 2016. (Photo by Janine Costa/Reuters)





Syrian protesters wear civil defence helmets during a re-enactment of the deaths of Aleppo's children in the Syrian civil war as they take part in a sit-in in solidarity with the people of Aleppo, in front of the offices of the U.N. headquarters in Beirut, Lebanon May 1, 2016. (Photo by Mohamed Azakir/Reuters)





Buses, which witnesses said were burnt by workers from construction company Saudi Binladin Group in a protest over delayed wages, are seen in Mecca, Saudi Arabia May 1, 2016. (Photo by Bandar Al Dandani/Reuters)





A camel rests near a concert to mark May Day in Raouche area, near the Pigeon Rocks in Beirut, Lebanon May 1, 2016. (Photo by Alia Haju/Reuters)





People march with an inflatable effigy of Republican presidential candidate Donald Trump during an immigrant rights May Day rally in Los Angeles, California, U.S., May 1, 2016. (Photo by Lucy Nicholson/Reuters)





Inna Shevchenko (C) and other topless Femen activists protest outside a banquet held by France's far-right Front National (FN) party in honour of Jeanne d'Arc (Joan of Arc) at the Porte de La Villette in Paris on May 1, 2016. (Photo by Alain Jocard/AFP Photo)





French police officers detain a topless Femen activist during a protest outside a banquet held by France's far-right Front National (FN) party in honour of Jeanne d'Arc (Joan of Arc) at the Porte de La Villette in Paris on May 1, 2016. (Photo by Alain Jocard/AFP Photo)





Lucian Bute of Canada (right) exchanges punches with Badou Jack of Sweden in their WBC super middleweight championship bout at the DC Armory on April 30, 2016 in Washington, DC. (Photo by Patrick Smith/Getty Images)





A Kenya Wildlife Services (KWS) ranger stands guard in front illegal stockpiles of burning elephant tusks at the Nairobi National Park on April 30, 2016. Eleven giant pyres of tusks were set alight Saturday as Kenya torched its vast ivory stockpile in a grand gesture aimed at shocking the world into stopping the slaughter of elephants. Lighting the fire in Nairobi's national park, Kenyan President Uhuru Kenyatta demanded a total ban on trade in ivory to end the “murderous” trafficking and prevent the extinction of elephants in the wild. (Photo by Carl De Souza/AFP Photo)





Contestants in the Miss Africa Pageant prepare themselves and their traditional outfits for the start of the pageant on April 30, 2016 in Johannesburg, South Africa. Barefoot, wearing traditional costumes including animal hide skirts and elaborately beaded headdresses, the contestants strutted the stage before Ghanaian Rebecca Asamoah was crowned the first Miss Africa Continent. (Photo by John Wessels/AFP Photo)





Miss Ghana, Rebecca Asamoah (C), reacts as she is crowned the first ever Miss Africa on April 30, 2016 in Johannesburg, South Africa. (Photo by John Wessels/AFP Photo)





Emergency personnel work at the scene after a CSX freight train derailed, spilling hazardous material, in Washington on Sunday, May 1, 2016. The Capitol is seen in the background. (Photo by Cliff Owen/AP Photo)





Flames trail from the car of Ryan Newman (31) after a pileup of crashed cars around the track during the NASCAR Talladega auto race at Talladega Superspeedway, Sunday, May 1, 2016, in Talladega, Ala. (Photo by Skip Williams/AP Photo)





Chris Buescher, driver of the #34 Love's Travel Stops/CSX-Play it Safe Ford, has an on track incident during the NASCAR Sprint Cup Series GEICO 500 at Talladega Superspeedway on May 1, 2016 in Talladega, Alabama. (Photo by Jerry Markland/Getty Images)





Alleged Peruvian drug trafficker Gerson Galvez, left, shouts at the press as he is escorted by a police officers into a Peruvian Air Force plane, in Bogota, Colombia, Sunday, May 1, 2016. Galvez who is one of Peru's most wanted criminals was captured by the Colombian police in Medellin on Saturday and was handed over to the Peruvian authorities. (Photo by Fernando Vergara/AP Photo)





Scorch marks seen in a residential building in Eisleben, Germany, 01 May 2016. Local police suspects a case of serious arson – with a potential xenophobic background since German, Syrian and Afghan families are currently residing in the building among others. (Photo by Jens Wolf/EPA)





Iraqi women walk past a damaged car following a twin suicide bombing attack, claimed by the Islamic State (IS) group, in the southern Iraqi city of Samawah, situated deep in Iraq's Shiite heartland, on May 1, 2016. (Photo by Haidar Hamdani/AFP Photo)





A former circus lion scratches its head against a tree inside an enclosure at Emoya Big Cat Sanctuary in Vaalwater, northern, South Africa, Sunday, May 1, 2016. Thirty-three lions rescued from circuses in Peru and Colombia are heading back to their homeland to live out the rest of their lives in a private sanctuary in South Africa. The operation is the largest ever airlift of lions, organized and paid for by Animal Defenders International. (Photo by Themba Hadebe/AP Photo)