In this June 28, 2015 file photo, people smile and gesture during the annual Chicago Pride Parade in Chicago. The coordinator for Chicago's 2016 upcoming gay pride parade said Wednesday, June 15, 2016, that organizers will hire dozens more off-duty police officers than they did last year after city officials asked them to beef up security in the wake of the massacre at a gay nightclub in Florida. (Photo by Nam Y. Huh/AP Photo)





A street vendor offers eggs for sale at a shanty town in Villa Fiorito on the outskirts of Buenos Aires, Argentina, June 15, 2016. (Photo by Enrique Marcarian/Reuters)





A man pushes a car at a flooded street in Jiujiang, Jiangxi Province, China, June 15, 2016. (Photo by Reuters/China Daily)





Students practice yoga during a training session ahead of World Yoga Day in Ahmedabad, India, June 16, 2016. (Photo by Amit Dave/Reuters)





Taiwanese honour guards stand during a ceremony to mark the 92nd anniversary of the Whampoa Military Academy, in Kaohsiung, southern Taiwan June 16, 2016. (Photo by Tyrone Siu/Reuters)





Taiwanese female cadets march during a ceremony to mark the 92nd anniversary of the Whampoa Military Academy, in Kaohsiung, southern Taiwan June 16, 2016. (Photo by Tyrone Siu/Reuters)





This handout photo realeased by the European Southern Observatory and taken on June 7, 2016 shows deep in the heart of the Abell 2597 Brightest Cluster Galaxy, a small cluster of giant gas clouds raining in on the central black hole. First postulated more than 230 years ago, black holes have been extensively researched, frequently depicted, even featured in films. But here's the thing we're still not sure they even exist. On a quest for proof, scientists have trained a massive telescope in Chile on a point some 24,000 lightyears away, where a supermassive black hole is thought to lurk. (Photo by AFP Photo/European Southern Observatory)





This artist's rendering made available by NASA/JPL-Caltech on July 7, 2015 shows the Juno spacecraft above Jupiter. The spacecraft is scheduled to arrive at the planet on July 4, 2016 to begin a nearly year-long study of the gas giant. (Photo by NASA/JPL-Caltech via AP Photo)





A simulated victim is lowered on a stretcher during an earthquake drill in Agartala, India, June 16, 2016. (Photo by Jayanta Dey/Reuters)





Supporters of the communist National Democratic Front (NDF) of the Philippines cover their faces and display placards as they call for the resumption of peace talks between the government and the Maoist-led rebels, during a protest along a main road in metro Manila, Philippines June 16, 2016. (Photo by Romeo Ranoco/Reuters)





People hold flags for candidates from Mongolian People's Party for the upcoming parliamentary elections and Dornogovi Aimag's civil representatives council elections, in Dornogovi Aimag, Mongolia, June 11, 2016. (Photo by Bazarsukh Rentsendorj/Reuters)





Football Soccer, England vs Wales, EURO 2016, Group B, Stade Bollaert-Delelis, Lens, France on June 16, 2016. Soccer fan Laura Woods from England fixes her makeup near riot police near the Lens stadium before the England vs Wales game. (Photo by Wolfgang Rattay/Reuters)





U.S. Navy sailors attach ammunition to a F/A-18 fighter jet before a mission on the flight deck of the USS Harry S. Truman aircraft carrier in the eastern Mediterranean Sea June 14, 2016. (Photo by Baz Ratner/Reuters)





A AV-8B Harrier II from the 13th Marine Expeditionary Unit launches from the USS Boxer (LHD 4) during its first day of striking ISIS held positions in Iraq from the Arabia Gulf, June 16, 2016. (Photo by Hamad I Mohammed/Reuters)





New recruit “Pepper” the robot, a humanoid robot designed to welcome and take care of visitors and patients, holds the hand of a new born baby next to his mother at AZ Damiaan hospital in Ostend, Belgium June 16, 2016. (Photo by Francois Lenoir/Reuters)





New recruit “Pepper” the robot, a humanoid robot designed to welcome and take care of visitors and patients, holds the hand of a new born baby at AZ Damiaan hospital in Ostend, Belgium June 16, 2016. (Photo by Francois Lenoir/Reuters)





Belgian Ian Frejean, 11, walks with “Zora” the robot, a humanoid robot designed to entertain patients and to support care providers, at AZ Damiaan hospital in Ostend, Belgium June 16, 2016. (Photo by Francois Lenoir/Reuters)





A participant stands behind a rainbow flag during a vigil in memory of the victims of the Pulse gay nightclub shooting in Orlando, Florida, in Mumbai, India June 16, 2016. (Photo by Danish Siddiqui/Reuters)





People walk along a foggy embankment of the Yenisei river in the Siberian town of Divnogorsk, Russia June 16, 2016. (Photo by Ilya Naymushin/Reuters)





Football Soccer EURO 2016 Lens, France on June 16, 2016. England fans celebrate their team's win in a fountain in Lille. (Photo by Pascal Rossignol/Reuters)





Alitalia's hostesses are seen during the official presentation of the direct connection from Rome to Mexico City at the Leonardo da Vinci-Fiumicino Airport in Rome, Italy June 16, 2016. (Photo by Remo Casilli/Reuters)





Football Soccer, Germany vs Poland, EURO 2016, Group C, Stade de France, Saint-Denis near Paris, France on June 16, 2016. Poland fan before the match. (Photo by Darren Staples/Reuters/Livepic)





Football Soccer, Ukraine vs Northern Ireland, EURO 2016, Group C, Stade de Lyon, Lyon, France on June 16, 2016. Northern Ireland head coach Michael O'Neill celebrates after Northern Ireland's Niall McGinn scores their second goal. (Photo by Jason Cairnduff/Reuters/Livepic)





Football Soccer, Germany vs Poland, EURO 2016, Group C, Stade de France, Saint-Denis near Paris, France on June 16, 2016. Poland fans before the match. (Photo by Kai Pfaffenbach/Reuters/Livepic)





An attendee stands with a rabbit on his shoulder during the Cannabis World Congress & Business Exposition in New York, U.S. June 16, 2016. (Photo by Lucas Jackson/Reuters)





Boys shout slogans during a demonstration against the removal of the Saudi-led coalition from the United Nations annual child rights blacklist, outside the United Nations offices in Sanaa, Yemen, June 16, 2016. (Photo by Mohamed al-Sayaghi/Reuters)





Boys hold weapons during a demonstration against the removal of the Saudi-led coalition from the United Nations annual child rights blacklist, outside the United Nations offices in Sanaa, Yemen, June 16, 2016. (Photo by Mohamed al-Sayaghi/Reuters)





Godmother Van Nessa Jemmott touches the casket of Raekwon Brown, a 17-year-old student at Jeremiah E. Burke High School who was shot to death outside the school June 8, following funeral services in Boston, Massachusetts, U.S. June 16, 2016. (Photo by Brian Snyder/Reuters)





People look on as fires break out in Cefalù near Palermo, southern Italy, June 16, 2016. (Photo by Guglielmo Mangiapane/Reuters)





Dockers hold up flares during a protest against what they say is a lack of job stability in Lisbon, Portugal June 16, 2016. (Photo by Rafael Marchante/Reuters)





In this September 9, 2010, file photo, a massive fire following a pipeline explosion roars through a mostly residential neighborhood in San Bruno, Calif. One of the country's largest utility companies is set to face a jury in a criminal trial accusing it of misleading investigators in the wake of a deadly pipeline explosion in the San Francisco Bay Area. The September 2010 blast of a Pacific Gas & Electric Co. natural gas pipeline sent a giant plume of fire into the air in a neighborhood in San Bruno, killing eight people and destroying 38 homes. Opening arguments in the trial began Thursday, June 16, 2016. (Photo by Jeff Chiu/AP Photo)





A Hotshots member from the U.S. Forest Department sets a back fire while battling the the so-called “Sherpa Fire”, which has grown to over 1100 acres overnight, in the hills near Goleta, California, U.S. June 16, 2016. (Photo by Mario Anzuoni/Reuters)





In this photo provided by the Santa Barbara County Fire Department, a firefighter knocks down flames as they approach a ranch near the Las Flores Canyon area west of Goleta, Calif., in the early morning hours of Thursday, June 16, 2016. The wildfire burning in rugged coastal canyons west of Santa Barbara is growing as it feeds on vegetation that hasn't burned in 70 years. (Photo by Mike Eliason/Santa Barbara County Fire Department via AP Photo)





Yemeni children play next to the wreckage of a car on June 15, 2016 in an empoverished part of the capital Sanaa. Yemen's warring parties are struggling to seal a peace deal as mutual mistrust has overshadowed eight weeks of UN-brokered talks in Kuwait that have failed to achieve any major breakthrough. (Photo by Mohammed Huwais//AFP Photo)





Activists light up flares of the LGBT colors during a vigil in memory of victims of the mass shooting at the Pulse gay night club in Orlando, in Sao Paulo, Brazil on June 16, 2016. (Photo by ZUMA Wire/Rex Features/Shutterstock)





The new Russian nuclear-powered icebreaker Arktika (Arctic) launches in St. Petersburg, Russia, Thursday, June 16, 2016. Russia has been modernizing its icebreaker fleet as part of its efforts to strengthen its Arctic presence. (Photo by Ruslan Shamukov/TASS)





Members of the U.S. Army take part in a military exercise “Iron Wolf 2016” at the Training Range in Pabrade some 60km (38 miles) north of the capital Vilnius,, Lithuania, Thursday, June 16, 2016. Iron Wolf 2016, the part of the annual multinational Exercise Saber Strike held in Lithuania, is running in June in Rukla and Pabrade, two training areas of the Lithuanian Armed Forces. In total, over 5 thousand soldiers from 7 NATO allies are training at the same time in Lithuania this year. (Photo by Mindaugas Kulbis/AP Photo)





Floral tributes and candles are placed by a picture of slain Labour MP Jo Cox at a vigil in Parliament square in London on June 16, 2016. Cox died today after a shock daylight street attack, throwing campaigning for the referendum on Britain's membership of the European Union into disarray just a week before the crucial vote. (Photo by Daniel Leal-Olivas/AFP Photo)





A Syrian man is seen at a mosque during night prayers, Tarawih, in rebel-held town of Douma, Damascus, Syria, 15 June 2016. Muslims around the world celebrate the holy month of Ramadan by praying during the night time and abstaining from eating and drinking during the period between sunrise and sunset. Ramadan is the ninth month in the Islamic calendar and it is believed that the Koran's first verse was revealed during its last 10 nights. (Photo by Mohammed Badra/EPA)





A French police officer holds a rose and an candle to pay homage to the two slain colleagues during a white march in Mantes-la-Jolie, west of Paris, Thursday, June 16, 2016. French police officials Jean-Baptiste Salvaing and his companion Jessica Schneider were killed Monday by an Islamic State extremist. (Photo by Kamil Zihnioglu/AP Photo)





Balinese dancers perform during the annual Bali Art Festival in Denpasar, Bali, Indonesia, 16 June 2016. The Bali Art Festival runs from 11 June until 09 July 2016, and features hundreds of local and international performers. (Photo by Made Nagi/EPA)





Indigenous Garífunas perform ritual during a protest to demand justice in the case of the Honduran killed indigenous and environmental leader Berta Caceres, in a street that gives access to the presidential residence, in Tegucigalpa, Honduras, 15 June 2016. (Photo by Gustavo Amador/EPA)





Models wear creations from the fashion label Martu, during the “Rio Moda Rio” fashion event in Rio de Janeiro, Brazil, 15 June 2016. (Photo by Antonio Lacerda/EPA)





Ukrainian firemen use foam to extinguish a mock fire during an emergency training at an underground gas storage facility near Poltava, Ukraine, 15 July 2016. (Photo by Roman Pilipey/EPA)





“Olli” an autonomous shuttle is seen at the Local Motors facility at the National Harbor in Maryland on June 16, 2016. The electric self-driving shuttle is partnership between Local Motors and IBM, using IBM's Watson supercomputer. “Olli”, which looks like a blocky miniature bus, can transport up to 12 passengers. Watson will be the technology that enables passengers to communicate with Olli while traveling. For example, passengers can ask questions such as “Olli, can you take me downtown?” to start heading in that direction. They can also ask questions about vehicle functionality, where they are going, or for recommendations for restaurants. The goal is to make it more interactive for passengers when they are riding with “Olli”. (Photo by Mandel Ngan/AFP Photo)





Young Nigerian refugees drag a cart loaded with food bags during a World Food Programme (WFP) and USAID food distribution at the Asanga refugee camp near Diffa on June 16, 2016 following attacks by Nigeria-based Boko Haram fighters in the region. Interior minister Mohamed Bazoum was paying a visit in Diffa today, after Boko Haram fighters on June 9 attacked a military post in Bosso in Niger's Diffa region, killing 26 soldiers including two from neighbouring Nigeria, in one of its deadliest attacks in Niger. (Photo by Issouf Sanogo/AFP Photo)





Buddhist monks and devotees pray and block a road outside the Wat Phra Dhammakaya temple in Pathum Thani province, north of Bangkok, Thailand, Thursday, June 16, 2016. Police entered the sprawling Buddhist temple complex after wading through thousands of devotees camped on the grounds to arrest a popular abbot accused of embezzling $14 million. (Photo by Sakchai Lalit/AP Photo)





A woman takes pictures of the monumental installation “The Floating Piers” created by Artist Christo Vladimirov Javacheff and Jeanne-Claude, on June 16, 2016 during a press preview at the lake Iseo, northern Italy. Some 200,000 floating cubes create a 3-kilometers runway connecting the village of Sulzano to the small island of Monte Isola on the Iseo Lake for a 16-day outdoor installation opening on June 18. (Photo by Filippo Monteforte/AFP Photo)





A woman walks on the monumental installation “The Floating Piers” created by artist Christo Vladimirov Javacheff and Jeanne-Claude, on June 16, 2016 during a press preview at the lake Iseo, northern Italy. (Photo by Filippo Monteforte/AFP Photo)





A young girl watches the laying of the wreath ceremony, at the Hector Pieterson Memorial, in Soweto, South Africa, Thursday, June 16, 2016, near to a painting depicting the iconic photo showing 13-year-old Hector Pieterson, being carried after being shot by police during the 1976 Soweto uprising, displayed by an artist for commemoration of the 40th anniversary of uprisings. South Africans are commemorating the 40th anniversary of a pivotal moment in the anti-apartheid struggle, a 1976 black student uprising in the Soweto area of Johannesburg that led to a deadly crackdown but launched a new phase of opposition to white minority rule. (Photo by Themba Hadebe/AP Photo)





Schoolgirls perform a dance as they commemorate the 40th anniversary of the Soweto Uprising in the Regina Mundi Church in Soweto, Thursday, June 16 2016. South Africans marked the 40th anniversary of a pivotal moment in the anti-apartheid struggle, a 1976 black student uprising, that led to a deadly crackdown. (Photo by Denis Farrell/AP Photo)





Pope Francis caresses a tiger during his audience to the “World of Travelling Shows” at Paul VI Hall at the Vatican, Thursday, June 16, 2016. (Photo by Fabio Frustaci/AP Photo)





Artists perform in front of Pope Francis during a Jubilee audience for the circus performers and street artists in Paul VI Hall at the Vatican June 16, 2016. (Photo by Tony Gentile/Reuters)





A high school student is detained by police during a march in downtown Santiago, Chile, Wednesday, June 15, 2016. Protesters are demanding education reform, such as free access to school for all ages, including university level. (Photo by Esteban Felix/AP Photo)





A rising steam is illuminated in different colors on a staircase at the Ministry for Education and Research in Berlin, Germany, 16 June 2016. (Photo by Rainer Jensen/EPA)