The famous picture of a man standing in front of a line of tanks on their way to Tiananmen Square in 1989 is not so famous in some places: "The image is largely blocked on the Internet in China. Despite its iconic status and historical significance elsewhere, most young people there do not recognize the photograph."

On the anniversary of the Tiananmen Square, the Great Firewall of China stands tall.

Previously: "It can be argued that some engagement with a tightly controlled society is better than no engagement, and that businesses exist to make money for their shareholders and not to be agents of social change. In any case, the Internet makes once-distant issues impossible to avoid. "