Riot police officers shoot tear gas canister against pro-democracy protesters in Hong Kong on September 21, 2019. - Riot police and protesters fought brief skirmishes in a town close to the Chinese border on September 21, the latest clashes during huge pro-democracy protests that have battered the financial hub for more that three months. (Photo by Nicolas ASFOURI / AFP) (Photo credit should read NICOLAS ASFOURI/AFP via Getty Images)
