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Note: The following text is a quote:

http://www.dhs.gov/xinfoshare/programs/Copy_of_press_release_0046.shtm

Homeland Security Advisory System

Current Threat Level
September 15, 2008 — The United States government’s national threat level is Elevated, or Yellow.

The U.S. threat level is High, or Orange, for all domestic and international flights. Only small amounts of liquids, aerosols and gels are allowed in carry-on baggage. See the Transportation Security Administration (TSA) Web site for up-to-date information on items permitted and prohibited on airlines.

There is no credible, specific intelligence suggesting an imminent threat to the homeland at this time. Still, we are closely assessing potential threats and response planning leading into and following the electoral process in 2008 to 2009. Heightened coordination and planning among intelligence community and law enforcement partners is being undertaken solely out of an abundance of caution, and focuses on preventive and preparedness measures for the transition period between administrations.

Recommended Activities

All Americans should continue to be vigilant, take notice of their surroundings, and report suspicious items or activities to local authorities immediately.

Everyone should establish an emergency preparedness kit and emergency plan for themselves and their family, and stay informed about what to do during an emergency.

Learn More About Preparedness
Visit www.ready.gov

About the Homeland Security Advisory System

The Homeland Security Advisory System is designed to guide our protective measures when specific information to a particular sector or geographic region is received. It combines threat information with vulnerability assessments and provides communications to public safety officials and the public.

Homeland Security Threat Advisories contain actionable information about an incident involving, or a threat targeting, critical national networks or infrastructures or key assets. They could, for example, relay newly developed procedures that, when implemented, would significantly improve security or protection. They could also suggest a change in readiness posture, protective actions, or response. This category includes products formerly named alerts, advisories, and sector notifications. Advisories are targeted to Federal, state, and local governments, private sector organizations, and international partners.

Homeland Security Information Bulletins communicate information of interest to the nation’s critical infrastructures that do not meet the timeliness, specificity, or significance thresholds of warning messages. Such information may include statistical reports, periodic summaries, incident response or reporting guidelines, common vulnerabilities and patches, and configuration standards or tools. It also may include preliminary requests for information. Bulletins are targeted to Federal, state, and local governments, private sector organizations, and international partners.

Color-coded Threat Level System is used to communicate with public safety officials and the public at-large through a threat-based, color-coded system so that protective measures can be implemented to reduce the likelihood or impact of an attack. Raising the threat condition has economic, physical, and psychological effects on the nation; so, the Homeland Security Advisory System can place specific geographic regions or industry sectors on a higher alert status than other regions or industries, based on specific threat information.

This system was established in Homeland Security Presidential Directive 3.