Young gymnasts practice pull-up on a bar at a gymnasium of a sports school in Jiaxing, Zhejiang province April 11, 2015. (Photo by William Hong/Reuters)

Indonesian students wearing paper masks take part in the East Java Mask Parade in Surabaya, Indonesia, 13 December 2015. Thousands of people participate in the traditional parade to preserve the mask custom among the younger generation. (Photo by Fully Handoko/EPA)

A police officer escorts a civilian away from the scene of a shooting, Sunday, July 22, 2018, in Toronto, Canada. A gunman opened fire in central Toronto on Sunday night, injuring 13 people including a child. Two dead including gunman, police reported. (Photo by Frank Gunn/The Canadian Press via AP Photo)

This photo take on December 16, 2016 shows macaques monkeys playing on a motorbike in the grounds of a temple in Jaipur in the Indian state of Rajasthan. (Photo by Dominique Faget/AFP Photo)

A visitor walks on a giant chalk artwork called “Wasting Time” at the Chalk Urban Arts Festival in Sydney on October 25, 2014. The picture is the biggest 3-D artwork created in Australia by two artists, Leon Keer from Holland and Jenny McCracken from Australia. (Photo by Peter Parks/AFP Photo)

Women in Chicago being arrested for wearing one piece bathing suits, without the required leg coverings. (Photo by Topical Press Agency/Getty Images). 1922

American film star Marilyn Monroe (Norma Jean Mortenson or Norma Jean Baker). (Photo by Keystone Features/Getty Images). 1952

Crashed cars in Finchley Road, north London. (Photo by Hulton Archive/Getty Images). May 1924