Dear Dr. Schmidt and Mr. Barnett [CEOs of Google & AltaVista]: We are writing to express our outrage at the Chinese government's reported blocking of access to Google and AltaVista...Companies that do business in China have an opportunity to play a proactive role in opening space for Chinese citizens to express themselves freely. Unfortunately, Yahoo!, along with a number of Chinese internet businesses and research institutes, has voluntarily signed a public pledge on "self-discipline" in China that commits the company to investigate and block websites based on their content.