At least, that's what Google says: The Tiananmen Square slaughter is obviously a myth.
Compare the page results on China's new ".cn" version of Google against what our .com version.
The real thing: http://images.google.com/images?q=tiananmen
The Chinese re-write: http://images.google.cn/images?q=tiananmen
Hat-tip to Cox and Forkum: see their cartoon and post here!