China: tight security surrounds Tiananmen anniversary

Thirty years on, a student protest leader recalls the tanks rolling into Tiananmen Square – as the US calls for China to reveal how many died in the crackdown. Beijing has called the remarks “an affront to the Chinese people”. We’ll hear how the anniversary is being marked – or not – in Beijing.

Also in the programme: we speak to a Sudanese protestor, after the ruling military council announces it’s cancelling all existing agreements with the opposition; and scientists have developed lab-grown ‘patches’ that can help repair damage following a heart attack.

(Picture: A lone demonstrator blocks the path of tanks in Tiananmen Square, Beijing, in June 1989. Credit: Reuters)