Beijing marked 30 years since the deadly Tiananmen crackdown on Tuesday with a wall of silence and extra security, while trading barbs with the United States over China's human rights record.
Police checked the identification cards of every tourist and commuter leaving the subway near Tiananmen Square, the site of the pro-democracy protests that were brutally extinguished by tanks and soldiers on June 4, 1989.
Foreign journalists were not allowed onto the square at all or warned by police not to take pictures. Officials also told one reporter that "illegal media behaviour" could impact visa renewals.
The United States marked