Correspondence issued by the Government Accountability Office with an abstract that begins "Senior military officials recently testified before Congress that current and future adversaries are likely to use "hybrid warfare" tactics, a blending of conventional and irregular approaches across the full spectrum of conflict. In addition, several academic and professional trade publications have commented that future conflict will likely be characterized by a fusion of different forms of warfare rather than a singular approach. The overarching implication of hybrid warfare is that U.S. forces must become more adaptable and flexible in order to defeat adversaries that employ an array of lethal technologies to protracted, population-centric conflicts such as those in Iraq and Afghanistan. Department of Defense (DOD) officials have discussed the need to counter the continuum of threats that U.S. forces could face from nonstate- and state-sponsored adversaries, including computer network and satellite attacks; portable surface-to-air missiles; improvised explosive devices; information and media manipulation; and chemical, biological, radiological, nuclear, and highyield explosive devices. In light of references to "hybrid warfare" by senior military officials and possible implications it could have for DOD's strategic planning, Congress requested we examine: (1) whether DOD has defined hybrid warfare and how hybrid warfare differs …

A letter report issued by the Government Accountability Office with an abstract that begins "In performing agency tasks, contractor employees often require access to sensitive information that must be protected from unauthorized disclosure or misuse. This report assesses the (1) extent to which agency guidance and contracts contain safeguards for contractor access to sensitive information, and (2) adequacy of governmentwide guidance on how agencies are to safeguard sensitive information to which contractors may have access. To conduct this work, GAO identified key attributes involving sensitive-information safeguards, analyzed guidance and met with officials at three agencies selected for their extensive reliance on contractor employees, analyzed 42 of their contract actions for services potentially requiring contractor access to sensitive information, and analyzed the Federal Acquisition Regulation (FAR) and pending FAR changes regarding governmentwide guidance on contractor safeguards for access to sensitive information."

A letter report issued by the Government Accountability Office with an abstract that begins "Cargo containers present significant security concerns given the potential for using them to smuggle contraband, including weapons of mass destruction. In January 2009, U.S. Customs and Border Protection (CBP), within the Department of Homeland Security (DHS), implemented the Importer Security Filing (ISF) and Additional Carrier Requirements, collectively known as the 10+2 rule. Collection of cargo information (10 data elements for importers, such as country of origin, and 2 data elements for vessel carriers), in addition to that already collected under other CBP rules, is intended to enhance CBP's ability to identify high-risk shipments. As requested, GAO assessed, among other things, (1) the extent to which CBP conducted the 10+2 regulatory assessment in accordance with Office of Management and Budget (OMB) guidance, (2) how CBP used information it collected and assessed to inform its efforts to implement the 10+2 rule since January 2009, and (3) the extent to which CBP has used the additional 10+2 data to identify high-risk cargo. GAO analyzed relevant laws, OMB guidance, and CBP's 10+2 regulatory assessment, and interviewed CBP officials."

A letter report issued by the Government Accountability Office with an abstract that begins "As the number of biological labs increases, so too do the safety risks for lab workers. Data on these risks--collected through a safety reporting system (SRS) from reports of hazards, incidents, and accidents--can support safety efforts. However, no such system exists for all biological labs, and a limited system--managed by the Centers for Disease Control and Prevention (CDC) and the Animal and Plant Health Inspection Service (APHIS)--applies to only a subset of these labs. While a national SRS has been proposed, design and implementation are complex. In this context, GAO was asked to identify lessons from (1) the literature and (2) case studies; and to apply those lessons to (3) assess CDC and APHIS's theft, loss, or release (TLR) system for select agents, such as anthrax, and (4) suggest design and implementation considerations for a labwide SRS. To do its work, GAO analyzed SRS literature; conducted case studies of SRSs in aviation, commercial nuclear, and health care industries; and interviewed agency officials and biosafety specialists."