OSTI is one of three federal government Web sites to make their content accessible for commercial search engines, according to a February 21, 2007 Government Executive article, “Google moves ahead with plan to open up federal Web sites.” OSTI took the initiative to pioneer government information exposure to commercial search engines supporting the Sitemap Protocol, and since that time Google has used the OSTI example to demonstrate its Sitemap Protocol. OSTI submitted the Google sitemap for its home page in April 2006. In addition, Google founder Larry Page spoke to scientists at the American Association for the Advancement of Science Annual Meeting in San Francisco in February, and stressed the importance of access to scientific information, saying, “We have to unlock the wealth of scientific knowledge and get it to everyone.” Currently, about half of OSTI's Web traffic (close to 80-million information transactions per year) stems from referrals from Google, Yahoo! and MSN. OSTI currently supplies the highest volume of data of federal Web sites via this new Sitemap Protocol.