Former student leader recalls Tiananmen Square crackdown Tuesday marks the 30th anniversary of the 1989 Tiananmen crackdown in Beijing where Chinese troops fired on peaceful protesters, drawing global condemnation. Three decades on, Wang Dan, one of the most visible student leaders who was arrested and imprisoned, says he still feels "responsibility" for those who died. Now based in the United States, Wang has not returned to China in 20 years. IMAGES AND SOUNDBITESREFILE TO ADD FILE PHOTOS