A letter report issued by the Government Accountability Office with an abstract that begins "Key standards for manufactured homes provide a lower margin of safety against a carbon monoxide exposure incident than those for site-built homes, which are constructed at their permanent locations. For instance, the Department of Housing and Urban Development (HUD) Code requires a minimum 3-foot separation between air intakes and exhaust vents, while industry standards for site-built homes have required a greater distance for many years. The industry standards call for a greater separation between air intakes and exhaust vents to help reduce the risk that contaminants such as carbon monoxide will re-enter the home. Indoor air quality experts whom GAO interviewed stated that the exhaust of an improperly operating furnace combined with unique wind conditions could, in rare cases, present a risk of carbon monoxide exposure. GAO analysis shows that increasing the separation between an air intake and exhaust vents, using industry standards, can significantly dilute concentrations of contaminants."

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) protects the U.S. homeland through two distinct but interrelated missions: (1) homeland defense, which defends against threats such as terrorism, weapons of mass destruction, and cyber incidents; and (2) civil support, which involves supporting other federal agencies in responding to major domestic disasters, emergencies, and special events. DOD has issued and updated several key pieces of doctrine, policy, and strategy for homeland defense and civil support, but it has not updated its primary Strategy for Homeland Defense and Civil Support since it was initially issued in 2005 and does not have a process--similar to that for its joint publications and directives-- to do so. The Joint Staff determined in August 2010 that joint publications on homeland defense needed a complete revision. The joint publication on civil support is also being revised. U.S. Northern Command, the combatant command responsible for homeland defense, is revising these publications to reflect changes in national and department priorities and to incorporate lessons learned from exercises and events such as Hurricane Katrina. Still, such key national and department-level strategies and significant events are not reflected in DOD's …