A letter report issued by the Government Accountability Office with an abstract that begins "The Transportation Security Administration's (TSA) most visible layer of commercial aviation security is the screening of airline passengers at airport checkpoints, where travelers and their carry-on items are screened for explosives and other dangerous items by transportation security officers (TSO). Several revisions made to checkpoint screening procedures have been scrutinized and questioned by the traveling public and Congress in recent years. For this review, GAO evaluated (1) TSA's decisions to modify passenger screening procedures between April 2005 and December 2005 and in response to the alleged August 2006 liquid explosives terrorist plot, and (2) how TSA monitored TSO compliance with passenger screening procedures. To conduct this work, GAO reviewed TSA documents, interviewed TSA officials and aviation security experts, and visited 25 airports of varying sizes and locations."

A letter report issued by the Government Accountability Office with an abstract that begins "In 1995, we first designated the Department of Defense's (DOD) business systems modernization program as "high risk," and we continue to designate it as such today. To assist in addressing this high-risk area, Congress passed legislation consistent with prior GAO recommendations for Defense to develop a business enterprise architecture (BEA). In September 2006, DOD released version 4.0 of its BEA, which despite improvements over prior versions, was not aligned with component architectures. Subsequently, Defense issued a strategy for extending its BEA to the component military services and defense agencies. To support GAO's legislative mandate to review DOD's BEA, GAO assessed DOD's progress in defining this strategy by comparing it with prior findings and recommendations relevant to the strategy's content."

A letter report issued by the Government Accountability Office with an abstract that begins "A key challenge in securing our homeland is ensuring that critical information collected by the Department of Homeland Security (DHS) and the Department of Justice (DOJ) is shared in a timely manner with federal, state, and local governments and the private sector. It is important that federal networks and associated systems, applications, and data facilitate this vital information sharing. GAO was asked to (1) identify DHS and DOJ networks and Internet-based system applications that support homeland security and (2) determine whether DHS efforts associated with its Homeland Security Information Network are being coordinated with key state and local information-sharing initiatives. GAO assessed the coordination between DHS and two key state and local initiatives of the Regional Information Sharing System program."

A letter report issued by the Government Accountability Office with an abstract that begins "On June 25, 2006, the Internal Revenue Service (IRS) headquarters building suffered flooding during a period of record rainfall and sustained extensive damage to its infrastructure. IRS officials ordered the closure of the building until December 2006 to allow for repairs to be completed. IRS headquarters officials reported activating several of the agency's emergency operations plans. Within 1 month of the flood, over 2,000 employees normally assigned to the headquarters building were relocated to other facilities throughout the Washington, D.C., metropolitan area. GAO was asked to report on (1) how IRS emergency operations plans address federal guidance related to continuity planning and (2) the extent to which IRS emergency operations plans contributed to the actions taken by IRS officials in response to the flood. To address these objectives, GAO analyzed federal continuity guidance, reviewed IRS emergency plans, and interviewed IRS officials."