Protesters are engulfed by teargas during a confrontation with riot police in Hong Kong Sunday, July 21, 2019. Hong Kong police launched tear gas at protesters Sunday after a massive pro-democracy march continued late into the evening. The action was the latest confrontation between police and demonstrators who have taken to the streets to protest an extradition bill and call for electoral reforms in the Chinese territory. (Lo Kwanho/HK01 via AP)