As Thursday's 20th anniversary of the Tiananmen Square massacre approaches, China has blocked access to Twitter, Flickr, and Hotmail, among other sites, TechCrunch reports. “The lead-up to any date like this is usually a time when the Firewall is tightened,” notes Mike Butcher, who was told by a contact in Beijing that “my only surprise in this matter is that it took ‘em so long."
(More Twitter stories.)