Police boost presence, check IDs in Beijing while authorities close off Hong Kong park where annual vigil held for pro-democracy protestors killed in 1989 crackdown

Pictures of Sister Ann Roza Nu Tawng kneeling in front of riot police and tearfully pleading with them not to open fire compared to images of Tiananmen Square tank man

30 years later, a look at a report from the field during the bloody crackdown in China on pro-democracy protesters, with the death toll unknown to this day

With figures disputed, tens or hundreds of thousands attend commemoration events for hundreds of victims in 1989 Chinese crackdown on Beijing protesters

Beijing imposes information lockdown on anniversary, continuing political repression to erase mass killings from public memory; some activists unreachable by phone or text