Pro-democracy protesters display placards and wave a colonial era flag of Hong Kong during a rally organized by higher education students in Chater Garden in Hong Kong, Friday, Aug. 16, 2019. China's paramilitary People's Armed Police marched and practiced crowd control tactics at a sports complex in Shenzhen across the border in Hong Kong on Friday, in what some have interpreted as a threat against pro-democracy protesters. Some placards read as "liberate Hong Kong, revolution of our times". (AP Photo/Kin Cheung)