Poppies are installed in an installation at Royal Hospital Chelsea on May 20, 2016 in London, England. The installation comprises of a tribute of almost 300,000 handcrafted poppies created by landscape designer Phillip Johnson. The display is in honour of all servicemen and women who have fought across all wars, conflicts and peacekeeping operations over the last 100 years, and will be on display at the 2016 RHS Chelsea Flower Show from 24-28 May 2016. (Photo by Dan Kitwood/Getty Images)





An Israeli-built Elbit Systems Hermes 450 unmanned aircraft is towed out of a hangar at the Hillsboro, N.D. airport on Friday, May 20, 2016, before its first flight to collect agriculture data. It is believed to be the first drone of its type to be tested in the United States, as part of a joint project between North Dakota State University and the Northern Plains UAS Test Site. (Photo by Dave Kolpack/AP Photo)





A White House chef walks past Secret Service agents as they stand on the North Lawn of the White House in Washington, Friday, May 20, 2016, after the White House was placed on security alert after shooting on street outside. (Photo by Andrew Harnik/AP Photo)





An injured protester is rushed to treatment as Iraqi security forces stand guard outside Baghdad's highly fortified Green Zone Friday, May 20, 2016. Iraqi security forces have fired tear gas and gunshots in the air as thousands of Shiite protesters stormed Baghdad's heavily secured Green Zone, rushing toward the prime minister's office and parliament building. (AP Photo/Karim Kadim)





People walk in front of the Louvre Pyramid covered with a giant photograph of the museum by French artist and photographer JR, on May 19, 2016 in Paris. Invited by the Louvre, the artist intends to tranform one of the Louvre's symbols, the Pyramid, “with a surprising anamorphic image”, according to the museum. The exhibition “Contemporary art – JR at the Louvre” will run from May 25 to June 27, 2016. (Photo by Joel Saget/AFP Photo)





A chariot carrying a golden urn makes its way during a procession in Oudong, Kandal province, northwest of Phnom Penh, Cambodia, Friday, May 20, 2016. Thousands of Cambodians joined a procession to return what they believe are Buddha's relics to a mountain-top shrine from where they were stolen three years ago. (Photo by Heng Sinith/AP Photo)





A firefighter uses a ladder to cross over to another room during a fire on the 19th floor of the Chateau De Baie Condominium in Baclaran, Paranaque city, metro Manila, Philippines May 20, 2016. (Photo by Romeo Ranoco/Reuters)





South Korean policemen take part in an anti-terror and security drill at a mall in Seoul, South Korea, May 20, 2016. (Photo by Kim Hong-Ji/Reuters)





South Korean rescue members wearing chemical protective suits walk past a monster character (R) during an anti-terror drill as part of a disaster management exercise at the COEX shopping and exhibition center in Seoul on May 20, 2016. South Korea is holding its 2016 Safe Korea anti-disaster exercise this week against terrorist threats and natural disasters. (Photo by Jung Yeon-Je/AFP Photo)





Sri Lankan navy and army personnel evacuate residents following flooding in the Kolonnawa suburb of Colombo on May 20, 2016. Desperate Sri Lankans clambered onto rubber dinghies and makeshift rafts May 20 to flee their homes in the flooded capital Colombo as fresh downpours elsewhere stalled rescue efforts at disaster zones. The heaviest rains in a quarter of a century have pounded the island since last weekend, sparking huge landslides that have buried victims in up to 50 feet (15 metres) of mud. (Photo by Ishara S.Kodikara/AFP Photo)





A man carries water and food in a bucket as they walk through a flooded road in Kaduwela, Sri Lanka May 20, 2016. (Photo by Dinuka Liyanawatte/Reuters)





A dog shakes water away as his owners walk him through a flooded road in Kaduwela, Sri Lanka May 20, 2016. (Photo by Dinuka Liyanawatte/Reuters)





A boy swims in a flooded road in Kaduwela, Sri Lanka May 20, 2016. (Photo by Dinuka Liyanawatte/Reuters)





Gymnasts perform during a ceremony marking the 10th anniversary of the German Olympic Sports Confederation (DOSB) in Frankfurt, Germany, May 20, 2016. (Photo by Kai Pfaffenbach/Reuters)





Russian President Vladimir Putin attends a session of the Russia-ASEAN summit in Sochi, Russia, May 20, 2016. (Photo by Yuri Kochetkov/Reuters)





Raoni Vieira from Pataxo tribe takes part in the Olympic Flame torch relay in Porto Seguro, Bahia state, Brazil, May 19, 2016. (Photo by Andre Mourao/Reuters/Courtesy of Rio2016)





Singer Ariana Grande has her makeup retouched on stage between performances on ABC's “Good Morning America” show in Central Park in New York City, U.S. May 20, 2016. (Photo by Brendan McDermid/Reuters)





Ahmed, a 60-year old Syrian refugee man, shows what food he can buy with his and his wife's monthly United Nations World Food Programme/Turkish Red Crescent food card allowance, at his home in Gaziantep, Turkey, May 16, 2016. (Photo by Umit Bektas/Reuters)





Athletics, IAAF Ostrava Golden Spike athletics meeting, Ostrava, Czech Republic on May 20, 2016. Germany's Markus Rehm competes in the men's long jump. (Photo by David W. Cerny/Reuters)





Hot air balloons are pictured over Luxor and the River Nile, Egypt May 20, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





Thai Buddhist monks meditate with candle lighting during the religious ceremony to mark Vesak Day or Visakha Bucha at Wat Pan Tao in Chiang Mai province, northern Thailand, 20 May 2016. Vesak Day or Visakha Bucha, one of the holiest days in Buddhism to commemorating the birth, enlightenment and the death of Buddha. (Photo by Pongmanat Tasiri/EPA)





Members of volunteer's battalion “Azov” and their supporters from various right-wing movements burn smoke flares during a march in downtown Kiev, Ukraine, 20 May 2016. Activists demanded banning any elections on territory controlled by pro-Russian rebels until full observance of the Minsk agreements and protested against a draft law to give special status to the eastern regions locked in a conflict between the Ukrainian military and pro-Russian separatists. (Photo by Sergey Dolzhenko/EPA)





Volunteers of the “Azov” Civil Corps light flares during rally at the Ukrainian Parliament, Friday, May 20, 2016, against holding local elections in the occupied eastern territories of Ukraine. As part of an internationally brokered peace agreement, Ukraine must hold local elections in two eastern regions controlled by Russian-backed rebels, but there are major concerns about ensuring the vote takes place in a secure and safe atmosphere. (Photo by Efrem Lukatsky/AP Photo)





Four Palestinian youths (L) walk in the port of Gaza, on 19 May 2016. The four youths who are friends lost their lower limbs after Israeli air strikes in Al Shejaeiya market in Al Shejaeiya neighbourhood in the east of Gaza, during last war against Gaza Strip in the summer of 2014. (Photo by Mohammed Saber/EPA)





Italian players fail to reach the ball during their match of the 2016 Women's Olympic Qualification Tournament in Tokyo, Japan, 20 May 2016. The Netherlands won the match. (Photo by Franck Robichon/EPA)





A scene from the notorious 1984 British drama film “The Killing Fields” is re-enacted during a ceremony at the Choeung Ek Genocidal Center, on the outskirts of Phnom Penh, Cambodia, 20 May 2016. Cambodia marks the annual Anger Day on 20 May to commemorate the victims who died during the cruel rule of the Khmer Rouge regime from 1975-1979. Some two million Cambodians are estimated to have died by starvation and forced labour or were killed in politically justified executions during the Khmer Rouge regime. (Photo by Mak Remissa/EPA)





Prime Minister David Cameron with former Culture Secretary Tessa Jowell try to recreate for the media the famous Beatles album cover during their visit to Abbey Road recording studios in north London Friday May 20, 2016, where they met with representatives of the creative industries to discuss a letter that called for the Britain to remain in the EU. (Photo by Jeremy Selwyn/Pool, via AP Photo)





People gesture and dance as they take part in a color festival on May 19, 2016 at Besiktas in Istanbul. (Photo by Ozan Kose/AFP Photo)





People gesture and dance as they take part in a color festival on May 19, 2016 at Besiktas in Istanbul. (Photo by Ozan Kose/AFP Photo)





Pakistani cleaners and bus drivers sleep on vehicles early-morning in Lahore on May 20, 2016. (Photo by Arif Ali/AFP Photo)





South Koreans leave messages written on post-it notes at an exit of Gangnam subway station, which has been turned into a mini shrine for a 23-year-old woman who was stabbed to death by a stranger the previous night in a nearby public bathroom, in Seoul on May 20, 2016. The brutal murder of a woman in Seoul's upmarket Gangnam district has triggered a public outcry and a debate over what some see as a growing streak of violent misogyny in South Korea. (Photo by Jung Yeon-Je/AFP Photo)





The Imam of al Thawrah Mosque, Samir Abdel Bary, gives condolences to film director Osman Abu Laban, center, who lost four relatives, all victims of Thursday's EgyptAir plane crash, following prayers for the dead, at al Thawrah Mosque, in Cairo, Egypt, Friday, May 20, 2016. The Airbus A320 plane was flying from Paris to Cairo when it disappeared early Thursday over the sea. (Photo by Amr Nabil/AP Photo)





University students participate in a pillow fight used as a symbolic act to indicate that this should be the only kind of war that occurs in the country, in Bogota, Colombia, Thursday, May 19, 2016. The peaceful event was led by former presidential candidate Antanas Mockus. (Photo by Fernando Vergara/AP Photo)





The CEO of Airbus, Tom Enders, left, and the head of APWorks, Joachim Zettler, present the first 3D printed electric motorcycle in Ottobrunn, Germany, Friday May 20, 2016. The motorcycle was made of metal powder by using lasermelting technology. The bike only weighs 35 kilos. (Photo by Sven Hoppe/DPA via AP Photo)





A local man tries to control a forest fire in Bhati, India, May 19, 2016. (Photo by Sanjay Baid/EPA)





Migrants play soccer at the migrants camp in Idomeni, Greece, Thursday, May 19, 2016. Thousands of stranded refugees and migrants have camped in Idomeni for months after the border was closed. (Photo by Darko Bandic/AP Photo)





Models pose for a snapchat photo on their mobile phone as they wait for pre-show instructions during rehearsal ahead of The Innovators: Fashion Design Studio show during Mercedes-Benz Fashion Week Resort 17 Collections on May 20, 2016 in Sydney, Australia. (Photo by Mark Kolbe/Getty Images)