... Information Security: IRS Needs to Continue to Address Significant Weaknesses. GAO-10-355. Washington, D.C.: March 19, 2010. Information Security: Concerted Effort Needed to Consolidate and ... 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 Manage, ... 2009. Information Security: Concerted Effort Needed to Improve Federal Performance Measures. GAO-09-617. Washington, D.C.: September 14, 2009. Information Security: Agencies Continue to Report...