Team Mexico attends their welcome ceremony at the Olympic Village, Rio Olympics, Rio de Janeiro, Brazil, July 31, 2016. Photo by Edgard Garrido

Japan’s Olympic Team practice, Rio Olympics, Rio de Janeiro, Brazil, July 31, 2016. Photo by Edgard Garrido

Canada’s Prime Minister Justin Trudeau walks with his wife Sophie Grégoire Trudeau and their children Xavier (L), Hadrien and Ella-Grace while participating in the Vancouver Pride Parade in Vancouver, British Columbia, Canada, July 31, 2016. Photo by Ben Nelms

Republican U.S. presidential nominee Donald Trump attends a campaign event at the Merrill Auditorium in Portland, Maine, August 4, 2016. Photo by Eric Thayer

Pilots plan a flight manoeuvre with model aircraft at a military air base in Vasylkiv, Ukraine, August 3, 2016. Photo by Gleb Garanich

Fighters of Libyan forces allied with the U.N.-backed government fire a rocket at Islamic State fighters in Sirte, Libya, August 4, 2016. Photo by Goran Tomasevic

Actors re-enact the attack by Islamic State militants on Yazidis of the town of Sinjar, to mark the second anniversary of what a U.N.-appointed commission of independent war crimes investigators termed a genocide against the Yazidi population by the Islamic State, in Dohuk, northern Iraq, August 3, 2016. Photo by Ari Jalal

A boy wearing a plastic mask walks in an industrial area in Mumbai, India, August 3, 2016. Photo by Shailesh Andrade

Mothers hold up their babies, as part of the celebration for World Breastfeeding Week, at Lovers Park in Bogota, Colombia, August 3, 2016. Photo by John Vizcaino

A Colombian anti-narcotics policeman stands guard after burning a cocaine lab, which police said belongs to criminal gangs, in a rural area of Calamar in Guaviare state, Colombia, August 2, 2016. Photo by John Vizcaino

A man takes a fishing boat on a lake in Shi’en, Hubei Province, China, August 4, 2016. Photo by China Stringer Network