Preface -- Social media: federal agencies need policies and procedures for managing and protecting information they access and disseminate / GAO -- Testimony of Gregory C. Wilshusen, director of information security issues, before the Subcommittee on Information Policy, Census, and National Archives, Committee on Oversight and Government Reform, House of Representatives on "information management: challenges in federal agencies' use of Web 2.0 technologies" -- Social networking and constituent communications: member use of Twitter during a two-month period in the 111th Congress / Matthew Eric Glassman, Jacob R. Straus, Colleen J. Shogan.