A riot policeman watches as a police vehicle burns in Braamfontein, Johannesburg, South Africa, Tuesday, October 25, 2016. Rioters in South Africa set a police vehicle on fire Tuesday and stoned vehicles near a Johannesburg university that has been the scene of sometimes violent protests by students demanding free education. The violence broke out in streets near the University of the Witwatersrand at around the same time that student protesters met and marched off the campus, South African media reported. (Photo by Yeshiel Panchia/AP Photo)

Hospitality staff members laugh as they stand on Tiananmen Square before the closing ceremony of China's 19th Party Congress at the Great Hall of the People in Beijing, Tuesday, October 24, 2017. The ruling Communist Party on Tuesday formally lifted Xi Jinping's status to China's most powerful ruler in decades, setting the stage for the authoritarian leader to tighten his grip over the country while pursuing an increasingly muscular foreign policy and military expansion. (Photo by Mark Schiefelbein/AP Photo)

A model wears a creation for Anthony Vaccarello's Spring/Summer 2015 ready-to-wear fashion collection, presented in Paris, Tuesday, September 23, 2014. (Photo by Jacques Brinon/AP Photo)

A model poses in front of the new Lamborghini Huracan during the media day of the 84th Geneva International Motor Show, Switzerland, Tuesday, March 4, 2014. (Photo by Laurent Cipriani/AP Photo)

A visitor poses with a 3D art work during a Japanese Trick Art exhibition at a shopping mall in Jakarta, Indonesia, Tuesday, December 4, 2012. (Photo by Dita Alangkara/AP Photo)

Two men play golf with a tennis ball as a snowstorm sweeps through Times Square, Tuesday, March 14, 2017, in New York. (Photo by Mark Lennihan/AP Photo)

In this photo taken on Tuesday, September 6, 2016 Omar Hassan poses in front of his creation “Breaking Through Milano” in his studio in Milan, Italy. (Photo by Antonio Calanni/AP Photo)

Mel Winnie Harlow poses for photographers before the presentation of Christian Dior's Spring-Summer 2018 ready-to-wear fashion collection in Paris, Tuesday, September 26, 2017. (Photo by Michel Euler/AP Photo)