Smoke and flames rise from Notre-Dame Cathedral on April 15, 2019 in Paris, France. A fire broke out on Monday afternoon and quickly spread across the building, collapsing the spire. The cause is yet unknown but officials said it was possibly linked to ongoing renovation work. (Photo by Veronique de Viguerie/Getty Images)





Flames burn the roof of the landmark Notre-Dame Cathedral in central Paris on April 15, 2019, potentially involving renovation works being carried out at the site, the fire service said. A major fire broke out at the landmark Notre-Dame Cathedral in central Paris sending flames and huge clouds of grey smoke billowing into the sky, the fire service said. The flames and smoke plumed from the spire and roof of the gothic cathedral, visited by millions of people a year, where renovations are currently underway. (Photo by Francois Guillot/AFP Photo)





People look at the flames burning the roof of the Notre-Dame Cathedral in Paris, France, 15 April 2019. A fire started in the late afternoon in one of the most visited monuments of the French capital. (Photo by Julien de Rosa/EPA/EFE)





Police detain a protester as climate change activists demonstrate during a Extinction Rebellion protest at the Waterloo Bridge in London, Britain on April 15, 2019. (Photo by Henry Nicholls/Reuters)





A climate change activist is seen at the entrance of the Shell Centre, during a Extinction Rebellion protest in London, Britain on April 15, 2019. (Photo by Henry Nicholls/Reuters)





A protestor covers his face with a bandana while he and others occupy the junction of a busy road as part of a service delivery protest in Eldorado Park, Johannesburg, South Africa, 15 April 2019. Reports state that the residents of the area protested over poor service delivery and demanded new housing. The ongoing service delivery issue is a major challenge for the ruling ANC as the country goes to the polls on 08 May 2019 for elections in the country. (Photo by Kim Ludbrook/EPA/EFE)





Police officers and soldiers escort electoral workers using horses to distribute ballot boxes and other election paraphernalia to polling stations in remote villages in Tempurejo, East Java, Indonesia, Monday, April 15, 2019. The world's third largest democracy is gearing up to hold its legislative and presidential elections that will pit the incumbent Joko Widodo against his contender former special forces general Prabowo Subianto. (Photo by AP Photo/Trisnadi)





A 3D printer prints a heart with human tissue during a presentation at the University of Tel Aviv, in Tel Aviv, Israel, Monday, April 15, 2019. Scientists in Israel on Monday unveiled a 3D print of a heart with human tissue and vessels, calling it a first and a “major medical breakthrough” that advances possibilities for transplants. (Photo by Oded Balilty/AP Photo)





A transparent cup containing what Israeli scientists from Tel Aviv University say is the world's first 3D-printed, vascularised engineered heart, is seen during a demonstration at a laboratory in the university, Tel Aviv, Israel on April 15, 2019. (Photo by Amir Cohen/Reuters)





Penitents of La Paz (The Peace) brotherhood take part in a procession during Holy Week in the Andalusian capital of Seville, Spain on April 14, 2019. (Photo by Marcelo del Pozo/Reuters)





A woman, penitent of Los Gitanos brotherhood, leaves a church as she takes part in a procession during Holy Week in Ronda, Spain on April 14, 2019. (Photo by Jon Nazca/Reuters)





A boy sells palms during a Palm Sunday mass outside the San Francisco Church in Lima, marking the start of the Holy Week, Peru on April 14, 2019. (Photo by Henry Romero/Reuters)





Shan ethnic people participate in a rehearsal in Panghsang on April 15, 2019, ahead of a military parade to celebrate 30 years of a ceasefire signed with the Myanmar military. (Photo by Ye Aung Thu/AFP Photo)





Doug Jones poses with the Pale Man Bust from “Pan's Labrynth” at Elite Creature Collectibles Booth on day 2 of Monsterpalooza held at Pasadena Convention Center on April 13, 2019 in Pasadena, California. (Photo by Albert L. Ortega/Getty Images)





An usher stands at the entrance to the “Wonderland” exhibition at ArtScience Museum in Marina Bay Sands on April 15, 2019 in Singapore. Wonderland runs from 13 April to 22 Spetember 2019. (Photo by Suhaimi Abdullah/Getty Images)





A Nepalese smears “sindoor” or vermillion powder, to a boy during Sindoor Jatra festival in Bhaktapur, Nepal, Tuesday, April 15, 2019. Devotees mark the festival by playing traditional drums, singing, dancing and carrying chariot of various deities around town while throwing sindoor, vermillion powder, to welcome the advent of spring and the New Year. (Photo by Niranjan Shrestha/AP Photo)





A gaucho falls from a bucking colt during the traditional rodeo week in Montevideo, Uruguay on April 14, 2019 (Photo by Pablo Porciuncula Brune/AFP Photo)





Drivers compete during the Jeep Sprint Festival organised by “Offroad Kings” club in the village of Ozernoe, some 35 km from Bishkek, on April 14, 2019. More than 50 drivers from Kyrgyzstan and Kazakhstan take part in the races in various categories. (Photo by Vyacheslav Oseledko/AFP Photo)





A skier in a festive costume attempts to cross a pool of water at the foot of a ski slope while competing in the annual Gornoluzhnik amateur event to mark the end of the ski season at the Bobrovy Log ski resort in the suburbs of the Siberian city of Krasnoyarsk, Russia, April 14, 2019. (Photo by Ilya Naymushin/Reuters)





A skier in a festive costume attempts to cross a pool of water at the foot of a ski slope while competing in the annual Gornoluzhnik amateur event to mark the end of the ski season at the Bobrovy Log ski resort in the suburbs of the Siberian city of Krasnoyarsk, Russia, April 14, 2019. (Photo by Ilya Naymushin/Reuters)





People play with water guns during Songkran Water Festival to celebrate Thai New Year, in Bangkok, Thailand on April 14, 2019. (Photo by Soe Zeya Tun/Reuters)





A girl is covered in yellow powder during Egypt's first Color Run in Giza, Egypt on April 13, 2019. (Photo by Mohamed Abd El Ghany/Reuters)





People take part in a Water Splashing festival to mark the New Year of the Dai ethnic group in Xishuangbanna Dai Autonomous Prefecture, Yunnan province, China on April 14, 2019. (Photo by Reuters/China Daily)