Correspondence issued by the Government Accountability Office with an abstract that begins "Defense trade impacts many issues of importance to the Department of Defense (DOD), including maintaining a healthy supplier base, protecting critical technologies, ensuring access to a secure supply of defense-related items and services, managing technology transfers, and increasing interoperability with allies. A critical element to guide decision makers is access to comprehensive and reliable data. The Committee on Armed Services, through its report on the National Defense Authorization Act for Fiscal Year 2006, directed GAO to identify and assess defense trade data. In response, we (1) identified defense trade data available from U.S. government sources and their limitations, and (2) determined defense trade balances as indicated by the data for years 2000 through 2004."

A letter report issued by the Government Accountability Office with an abstract that begins "Primarily because of concerns that noise from air tours over national parks could impair visitors' experiences and park resources, Congress passed the National Parks Air Tour Management Act of 2000 to regulate air tours. The act requires the Federal Aviation Administration (FAA) and the National Park Service to develop air tour management plans for all parks where air tour operators apply to conduct tours. A plan may establish controls over tours, such as routes, altitudes, time of day restrictions, and/or a maximum number of flights for a given period; or ban all air tours. GAO was asked to (1) determine the status of FAA and the Park Service's implementation of the act; (2) assess how the air tour operators and national parks have been affected by implementation; and (3) identify what issues, if any, need to be addressed to improve implementation."

A letter report issued by the Government Accountability Office with an abstract that begins "Terrorist attacks on U.S. chemical facilities could damage public health and the economy. While the Environmental Protection Agency (EPA) formerly led federal efforts to ensure chemical facility security, the Department of Homeland Security (DHS) is now the lead federal agency coordinating efforts to protect these facilities from terrorist attacks. GAO reviewed (1) DHS's actions to develop a strategy to protect the chemical industry, (2) DHS's actions to assist in the industry's security efforts and coordinate with EPA, (3) industry security initiatives and challenges, and (4) DHS's authorities and whether additional legislation is needed to ensure chemical plant security. GAO interviewed DHS, EPA, and industry officials, among others."