Thirty-seven years after the Tiananmen Square crackdown, the event remains one of the most sensitive and heavily censored chapters in China's modern history. As families of victims report new restrictions on memorial visits,

In the Chinese territory of Hong Kong, police also stepped up security to prevent any commemoration of the 1989 crackdown on pro-democracy protesters in Beijing.

China strongly criticized U.S. Secretary of State Marco Rubio over his remarks on the 1989 Tiananmen Square crackdown, denouncing them as an attack on China's political system. As international vigils mark the event's anniversary,

Authorities have been largely successful at erasing the massacre of protesters who fought for democratic reforms, but the facts are emerging in often unexpected ways.