Thirty years ago, a Chinese man carrying his shopping stood in front of a column of tanks from the People’s Liberation Army in Tiananmen Square, Beijing. Tank Man, as he was to be known, became an iconic image from the protests. His stand was the culmination of weeks of clashes between Chinese pro-democracy protesters and the government, during which thousands of people are thought to have been killed

• Beijing falls silent as tight security surrounds Tiananmen Square anniversary