"Events such as the February 2010 attack on the Internal Revenue Service offices in Texas, and the shooting in the lobby of the Nevada federal courthouse, demonstrate the vulnerabilities of federal facilities and the safety of the federal employees who occupy them. The Federal Protective Service (FPS) is the primary agency responsible for the security of over 9,000 federal government facilities across the country. The fiscal year 2010 DHS appropriations act transferred FPS from Immigration and Customs Enforcement (ICE) to the National Protection and Programs Directorate (NPPD), within the Department of Homeland Security (DHS). This report addresses (1) the extent to which the FPS transition has been implemented and any remaining related challenges, and (2) the extent to which the transition will help address previously identified challenges to protecting federal facilities. GAO reviewed the 2009 FPS-NPPD transition plan; agreements between FPS, NPPD, and ICE, and best practices for scheduling and cost estimating; and interviewed DHS officials. GAO recommends that DHS improve the schedule for transferring IT services to reflect scheduling best practices, and update the IT transition cost estimate, in accordance with cost-estimating best practices. DHS"