Goodbye, Homeland Security Advisory System (HSAS). Hello, National Terrorism Advisory System (NTAS). The HSAS, first implemented in response to the September 11th attacks, was designed to “inform all levels of government and local authority, as well as the public, to the current risk of terrorist acts.” As many of us know, the previous system was built on a five-level, color-coded threat condition indicator that attempted to assign a color according to the current threat level. Latent with unrealized benefits, this colorful experiment has officially ended as of April 2011. In its place we find DHS writing a new chapter of homeland security preparedness.