Internet used as tool to squash dissent in China

We in the U.S. are familiar with controls that allow parents to block their children from viewing pornographic web sites on the Internet. If you live in China you can find all the porn you want, but you won't see terms like "demonstration", "democratic movement" and "Taiwan independence" on your screen, thanks to the government, with the help of U.S. software companies. It seems that some big names like Microsoft, Yahoo, and yes, even Google, are helping Chinese authorities crack down on dissenters and even put some in jail, according to Asianews. Yahoo has already been the target of protests by human rights groups for its policy of collaborating with Big Brother.