Not only can you watch the entire 90 minute PBS special online, but the site also includes a timeline of events, world reaction, and the transcript of a panel discussion on China's struggle to control information and censor the Internet.
In addition to background about the PBS film The Gate of Heavenly Peace, this companion site contains articles analyzing the events leading up to the demonstrations, video and audio clips, posters, and photographs.
This New York Times section is a collection of reporting from both 2009 (the twentieth anniversary) and 1989.
5 stars For the 2009 twentieth anniversary of the Tiananmen Square Massacre, independent news site The Epoch Times created a special edition with dozens of articles analyzing the event.
Surfnetkids.com offers websites about the Tiananmen Square Massacre.