China blocks access to such websites as Twitter, Flickr, and Hotmail, ahead of the anniversary of the massacre in Tiananmen Square on June 4, 1989.
//www.cbc.ca/technology/story/2009/06/02/china-blocks-links.html (CBC)
//news.bbc.co.uk/1/hi/world/asia-pacific/8078538.stm (BBC)
