Author and radio personality Garrison Keillor, who stated that "libraries are the best counter terrorism tool we have," brought to a close the largest conference in the history of the American Library Association (ALA). More than 28,635 librarians, exhibitors and library supporters attended the 128th ALA Annual Conference at the Washington Convention Center from June 21 to 27. According to the Washington, D.C. Tourism Bureau, the conference generated more than $15.6 million in revenue for the local economy.