Republican U.S. presidential nominee Donald Trump speaks as Democratic U.S. presidential nominee Hillary Clinton listens during their first presidential debate at Hofstra University in Hempstead, New York, U.S., September 26, 2016. Photo by Rick Wilking.

Democratic U.S. presidential nominee Hillary Clinton smiles as she leaves the stage after the conclusion the first debate with Republican U.S. presidential nominee Donald Trump at Hofstra University in Hempstead, New York, U.S., September 26, 2016. Photo by POOL New.

Republican U.S. presidential nominee Donald Trump listens during the first debate with Democratic U.S. presidential nominee Hillary Clinton at Hofstra University in Hempstead, New York, U.S., September 26, 2016. Photo by Lucas Jackson.

The Smog Free Ring made of compressed smog particles collected by the world’s largest smog vacuum cleaner designed by Dutch artist and innovator Daan Roosegaarde as part of his The Smog Free Project is presented at D-751 art zone in Beijing September 29, 2016. Photo by Damir Sagolj.

Dutch artist and innovator Daan Roosegaarde holds smog particles collected by the Smog Free Tower, the world’s largest smog vacuum cleaner as the artist presents his The Smog Free Project at D-751 art zone in Beijing September 29, 2016. Photo by Damir Sagolj.

The flag-draped coffin of former Israeli President Shimon Peres is carried by an honour guard at the start of his funeral ceremony at Mount Herzl cemetery in Jerusalem September 30, 2016. Photo by Baz Ratner.

Britain’s Prince William (R), and Catherine (2nd R), Duchess of Cambridge, pose for a photo with Canada’s Prime Minister Justin Trudeau (2nd L) and his wife Sophie Gregoire Trudeau at the start of a meeting in Victoria, British Columbia, Canada, September 24, 2016. Photo by Chris Wattie.

The site of a landslide caused by heavy rains brought by Typhoon Megi, in Sucun Village, Lishui, Zhejiang province, China, September 29, 2016. Photo by China Daily.

A member of the gallery takes a photograph of a piece called «Sleeping Field», by artist Antony Gormley, which forms part of an exhibition entitled «Fit», at the White Cube gallery in London, Britain September 29, 2016. Photo by Peter Nicholls.

The Pioneer Team, a civil aerobatic team from Italy, let off pyrotechnics from their Pioneer 330 aircraft during the Malta International Airshow off SmartCity Malta, outside Valletta, Malta, September 24, 2016. Photo by Darrin Zammit Lupi.

Formula One – F1 – Malaysia Grand Prix – Sepang, Malaysia- Mercedes’ Lewis Hamilton of Britain in action during first practice, September 30, 2016. Photo by Edgar Su.

A woman walks under a canopy of umbrellas erected outside the Ministry of Public Health, part of a campaign aiming at raising awareness of breast cancer prevention, in Beirut, Lebanon September 30, 2016. Photo by Mohamed Azakir.

An Artis Zeego X-ray robot is pictured in a new hybrid operating room of the IHU, Institute of Image-Guided Surgery in Strasbourg, France, September 29, 2016. Photo by Vincent Kessler.

Members of the Falash Mura Jewish Ethiopian community attend a prayer service at the HaTikvah Synagogue in Gondar, northern Ethiopia, September 30, 2016. Photo by Tiksa Negeri.

Singer Rihanna arrives to atttend the Italian designer Maria Grazia Chiuri Spring/Summer 2017 women’s ready-to-wear collection for fashion house Dior during Fashion Week in Paris, France September 30, 2016. Photo by Gonzalo Fuentes.