Chelsea pensioners John Kidman, aged 87, right, and Bill “Spud” Hunt, aged 83, pose for photographers by wearing virtual reality headsets during an exhibition launch inside 18th century vaulted stables at the Household Cavalry Museum in London, Tuesday, July 25, 2017. The exhibit uses virtual reality videos, with diary accounts, audio, archive film and photos to commemorate the 100-year anniversary of the Battle of Passchendaele in World War I, which saw an estimated total of 550,000 soldiers killed from both sides. (Photo by Matt Dunham/AP Photo)





Migrants wait to be rescued by aid workers of Spanish NGO Proactiva Open Arms in the Mediterranean Sea, about 15 miles north of Sabratha, Libya on Tuesday, July 25, 2017. (Photo by Santi Palacios/AP Photo)





People enjoy the beach as they look at a forest fire in La Croix-Valmer, near Saint-Tropez, on July 25, 2017. Firefighters battle blazes that have consumed swathes of land in southeastern France for a second day, with one inferno out of control near the chic resort of Saint-Tropez, emergency services say. (Photo by Valery Hache/AFP Photo)





UK Foreign Secretary Boris Johnson holds a tuatara during a visit to Zealandia ecosanctuary on July 25, 2017 in Wellington, New Zealand. The British Foreign Secretary and former London Mayor is visiting New Zealand on a two-day trip. (Photo by Hagen Hopkins-Pool/Getty Images)





Indian soldiers stand in rain during the swearing in ceremony of India's new President Ram Nath Kovind at the Rashtrapati Bhavan presidential palace in New Delhi, India, July 25, 2017. (Photo by Cathal McNaughton/Reuters)





A man carries a wounded boy on his back in Arbin, a town in the Damascus countryside, Syria July 25, 2017. (Photo by Bassam Khabieh/Reuters)





Fireflies seeking mates light up in synchronised bursts as a cameraman talks to a tour guide inside a forest at Piedra Canteada sanctuary near the town of Nanacamilpa, Tlaxcala state, Mexico, July 24, 2017. (Photo by Edgard Garrido/Reuters)





People dressed as Santa Claus bathe in the sea as they take part in the World Santa Claus Congress, an annual event held every summer at the amusement park Dyrehavsbakken, in Copenhagen, Denmark on July 26, 2017. (Photo by Sarah Christine Noergaard/Reuters/Scanpix Denmark)





A woman wades through a road flooded by heavy rain in Ahmedabad, July 24, 2017. (Photo by Amit Dave/Reuters)





A member of the French team juggles a ball during the battles of the freestyle juggling contest of the 8th Francophone Games in Abidjanon on July 24, 2017. (Photo by Sia Kambou/AFP Photo)





U.S. President Donald Trump kisses first lady Melania Trump after she introduced him at a rally with supporters in an arena in Youngstown, Ohio, U.S. July 25, 2017. (Photo by Jonathan Ernst/Reuters)





India's number one tennis player Sania Mirza and Bollywood star Neha Dhupia in action during the WTA Future Stars Masterclass with Sania Mirza and Neha Dhupia in Hyderabad, India on July 25, 2017. (Photo by Krishnendu Halder/Reuters Plus)





India's number one tennis player Sania Mirza in action during the WTA Future Stars Masterclass with Sania Mirza and Neha Dhupia in Hyderabad, India on July 25, 2017. (Photo by Krishnendu Halder/Reuters Plus)





Pro-abortion activists perform a dance during a rally held to support women's rights to an abortion in Santiago, Chile July 25, 2017. (Photo by Ivan Alvarado/Reuters)





A dog barks at a riot police vehicle during a rally held to support women's rights to an abortion in Santiago, Chile July 25, 2017. (Photo by Ivan Alvarado/Reuters)





A demonstrator with face paint takes part in a protest by black and indigenous women against racism and machismo in Sao Paulo, Brazil, July 25, 2017. (Photo by Nacho Doce/Reuters)





Well-wishers release sea turtles at the Sea Turtle Conservation Center as part of the celebrations for the upcoming 65th birthday of Thai King Maha Vajiralongkorn, in Sattahip district, Chonburi province, Thailand, July 26, 2017. (Photo by Athit Perawongmetha/Reuters)





The Soyuz MS-05 spacecraft for the next International Space Station (ISS) crew of Paolo Nespoli of Italy, Sergey Ryazanskiy of Russia, and Randy Bresnik of the U.S., is transported from an assembling hangar to the launchpad ahead of its upcoming launch, at the Baikonur Cosmodrome in Baikonur, Kazakhstan July 26, 2017. (Photo by Shamil Zhumatov/Reuters)





Tourists stand under a Swiss national flag atop an island in between the Rhine Falls, the largest falls in Europe, in the town of Neuhausen, Switzerland July 25, 2017. (Photo by Arnd Wiegmann/Reuters)





Masks of US President Donald J. Trump used by two alleged thieves are displayed by Italian Carabinieri police during a press conference in Turin, northern Italy, 24 July 2017. Two brothers, Vittorio and Ivan Lafore, used the masks to disguise themselves as they allegedly attempted to break into ATM cash machines. The brothers were arrested on 24 July 2017 in Turin. (Photo by Alessandro Di Marco/EPA)





Rescuers attempt to bring a speedboat that sank off Tarakan island to the surface after it was towed towards the shore in North Kalimantan, Indonesia, Tuesday, July 25, 2017. More than a dozen people have been killed and missing in two sea accidents in eastern and central Indonesia since the weekend. Sinkings are common in the world's largest archipelago nation, where boats are a popular and relatively cheap form of transportation. (Photo by AP Photo/Hermawan)





Relatives weep at a hospital after learning that their family members are among the victims of a speedboat that sank off Tarakan, North Kalimantan, Indonesia, Tuesday, July 25, 2017. (Photo by AP Photo/Albar)





Sergey Khodos (R) of Russia competes against Peter Somfai of Hungary during the third place match between Hungary and Russia for the men's team Epee event at the Fencing World Championships in Leipzig, Germany, 25 July 2017. (Photo by Filip Singer/EPA)





Nurses walk wearing masks to protect themselves form the swine flu virus outside the Naypyitaw Hospital Tuesday, July 25, 2017, in Naypyitaw, Myanmar. Public health officials in Myanmar say that H1N1 flu, also known as swine flu, has killed three people out of 13 confirmed cases of the infection. (Photo by Aung Shine Oo/AP Photo)





Broken sea ice emerges from under the hull of the Finnish icebreaker MSV Nordica as it sails through the Victoria Strait while traversing the Arctic's Northwest Passage, Friday, July 21, 2017. Sea ice forms when the top layer of water reaches freezing point, usually around the start of October. As temperatures continue to fall this first-year ice grows downward until it is several feet thick. If the ice survives the following summer melt it becomes second-year ice. Another cycle and it becomes multi-year ice, which is the toughest kind. (Photo by David Goldman/AP Photo)





Circus artists perform a stunt opposite the Houses of Parliament to announce the official launch of Circus250 in London, Tuesday, July 25, 2017. (Photo by Frank Augstein/AP Photo)