Workers gather by the sidewalk of Main Street that caved in after Saturday night's flooding in Ellicott City, Md., Sunday, July 31, 2016. Historic, low-lying Ellicott City, Maryland, was ravaged by floodwaters Saturday night, killing a few people and causing devastating damage to homes and businesses, officials said. (Photo by Kevin Rector/The Baltimore Sun via AP Photo)





A child plays in front of “Etnias”, a large graffiti wall by Brazilian graffiti artist Eduardo Kobra created ahead of the Rio 2016 Olympic Games at Porto Maravilha in Rio de Janeiro, Brazil, 30 July 2016. The Olympics start on 05 August. Eduardo Kobra hopes to set a Guinness World Record for the largest graffiti created by a single artist. (Photo by Lukas Coch/EPA)





A performer prepares to take part in a ceremony to mark the one year anniversary of Beijing's successful bid for the 2022 Winter Olympics and Paralympics at the Badaling Great Wall in Beijing, Sunday, July 31, 2016. Come 2022, Beijing will be the first city to have hosted both the Summer and Winter Olympic Games. (Photo by Ng Han Guan/AP Photo)





Displaced women, who fled from Al-Shirqat, due to Islamic State violence, arrive on the outskirts of Al-Shirqat, south of Mosul, Iraq, July 30, 2016. (Photo by Reuters/Stringer)





Displaced people, who fled from Al-Shirqat due to Islamic State violence, receive aid on the outskirts of Al-Shirqat, south of Mosul, Iraq, July 30, 2016. (Photo by Reuters/Stringer)





Displaced people, who fled from Al-Shirqat due to Islamic State violence, receive aid on the outskirts of Al-Shirqat, south of Mosul, Iraq, July 30, 2016. (Photo by Reuters/Stringer)





Displaced people, who fled from Al-Shirqat due to of Islamic State violence, arrive on the outskirts of Al-Shirqat, south of Mosul, Iraq, July 30, 2016. (Photo by Reuters/Stringer)





A displaced woman, who fled from Al-Shirqat, due to Islamic State violence, holds her child on the outskirts of Al-Shirqat, south of Mosul, Iraq, July 30, 2016. (Photo by Reuters/Stringer)





Germany Formula One, F1, German Grand Prix 2016, Hockenheimring, Germany on July 31, 2016. Mercedes' Lewis Hamilton waves during the drivers' parade. (Photo by Ralph Orlowski/Reuters)





German police stand in front of protesters against Turkish President Tayyip Erdogan during a pro-government protest in Cologne, Germany July 31, 2016. (Photo by Vincent Kessler/Reuters)





An injured member of Kurdish Peshmerga forces reacts as smoke rises after an attack at Bai Hassan oil station, northwest of Kirkuk, Iraq, July 31, 2016. Militants have attacked a gas facility and an oilfield in northern Iraq, killing five people. Gunmen on motorbikes opened fire on the facility’s guards, then killed four of its employees and planted bombs before escaping. Militants also attacked the nearby Bai Hassan oilfield, the largest in oil-rich Kirkuk province, killing an engineer and causing a major fire. Attacks inside Kurdish-controlled areas of the province are rare. The jihadi-linked Amaq agency, which often carries claims of Islamic State attacks, said the assault on Bai Hassan had taken place, but did not attribute it to Isis. (Photo by Ako Rasheed/Reuters)





Rescuers pull out a sniffer dog at the site of a collapsed residential building on the outskirts of Mumbai, India, July 31, 2016. (Photo by Shailesh Andrade/Reuters)





A body lies on the road as Somalis Security comb the area in a suicide car bomb attack outside The Criminal Investigation Department (CID) in Mogadishu, Somalia, Sunday, July 31, 2016. Two suicide bombers detonated an explosives-laden car outside the Criminal Investigation Department (CID) in Mogadishu, killing 9 people, including two bombers, and others were injured, a Somali police official said. (Photo by Farah Abdi Warsameh/AP Photo)





A Somali policeman walks towards the scene of an explosion outside the headquarters of Somalia's Criminal Investigation Department (CID) in the capital Mogadishu, July 31, 2016. (Photo by Ismail Taxta/Reuters)





2016 Rio Olympics, Olympic Park, Rio de Janeiro, Brazil on July 31, 2016. Larissa Miller of Australia practices. (Photo by Pilar Olivares/Reuters)





A street entertainer interacts with tourists on the Southbank in central London, Britain July 31, 2016. (Photo by Peter Nicholls/Reuters)





A man jumps from the Old Bridge during 450th traditional diving competition in Mostar, Bosnia and Herzegovina, July 31, 2016. (Photo by Dado Ruvic/Reuters)





Britain Golf, RICOH Women's British Open 2016, Woburn Golf & Country Club, England on July 31, 2016. Thailand's Ariya Jutanugarn celebrates after Women's British Open 2016. (Photo by Andrew Couldridge/Reuters/Action Images/Livepic)





British wing-walker Danielle Hughes from 46 aviation group performs acrobatics on a Stearman biplane over a beach during an airshow in Torre del Mar, southern Spain, July 31, 2016. (Photo by Jon Nazca/Reuters)





Chinese journalists jump in front of the rings at sunset in the Olympic Park in Rio de Janeiro, Brazil on July 31, 2016. (Photo by Nacho Doce/Reuters)





People rappel from a bridge to form the Olympic rings in Sao Paulo, Brazil, July 31, 2016. (Photo by Paulo Whitaker/Reuters)





People rappel from a bridge to form the Olympic rings in Sao Paulo, Brazil, July 31, 2016. (Photo by Paulo Whitaker/Reuters)





A crowd cheers for Canada's Prime Minister Justin Trudeau while wearing t-shirts with his face printed on them as he walks in the Vancouver Pride Parade in Vancouver, British Columbia, July 31, 2016. (Photo by Ben Nelms/Reuters)





In this July 30, 2016 picture participants challenge for the ball during the Mud Olympics event at the North Sea tideland in Brunsbuettel, Germany. Since 2004, teams of different disciplines, such as mud soccer, mud handball and mud sledding, compete against each other. (Photo by Daniel Bockwoldt/DPA via AP Photo)





Kyrgyz men fight on horses as they take part in the “Oodarysh” horse fights during a traditional folk festival at Son-Kul lake, 3016 metres above the sea level, some 350 kms from Bishkek on July 29, 2016. The festival marks the 220th anniversary of the national hero Tailak Baatyr. (Photo by Vyacheslav Oseledko/AFP Photo)





A mas band member walks under a pedestrian bridge along the parade route at the Toronto Caribbean Carnival's grand parade, in Toronto on Saturday, July 30, 2016. (Photo by Cole Burston/The Canadian Press via AP Photo)





Workers rest after work at the beach volleyball arena on the Copacabana beach in Rio de Janeiro, Brazil, 30 July 2016. (Photo by Sergei Ilnitsky/EPA)





Co-hosts Victoria Justice (L) and John Cena speak onstage during Teen Choice Awards 2016 at The Forum on July 31, 2016 in Inglewood, California. (Photo by Kevin Winter/Getty Images)