... Federal Laws, Regulations, and Mandatory Standards to Securing Private Sector Information Technology Systems and Data in Critical Infrastructure Sectors. GAO-08-1075R. Washington, D.C.: September ... D.C.: October 15, 2009. Information Security: NASA Needs to Remedy Vulnerabilities in Key Networks. GAO-10-4. Washington, D.C.: October 15, 2009. Information Security: Actions Needed to Better ... Response Needed to Resolve Persistent Weaknesses. GAO-10-536T.Washington, D.C.: March 24, 2010. Information Security: IRS Needs to Continue to Address Significant Weaknesses. GAO-10-355. Washington,...