Learning about the Tiananmen crackdown
June 4 is a forbidden anniversary in China. The government heavily censors nearly all reference to the date of the deadly crackdown on protesters at Tiananmen Square in 1989. So, how do Chinese people come to understand this "sensitive anniversary"? Marco Werman speaks with Yangyang Cheng, who grew up in China, and with Susan Jakes, editor at the ChinaFile website.