“The National Terrorism Advisory System (NTAS) replaces the color codes of the Homeland Security Advisory System (HSAS). The new alert system is currently in a 90 day implementation period that began on January 27, 2011 – until the end of the implementation period, the existing HSAS will remain in effect. NTAS will more effectively communicate information about terrorist threats by providing timely, detailed information to the public, government agencies, first responders, airports and other transportation hubs, and the private sector.