The U.S. Department of Homeland Security (DHS) issued a National Terrorism Advisory System (NTAS) Bulletin, on December 16, 2015, formally updating the NTAS by adding a new form of advisory – the NTAS “Bulletin”. The Bulletins are an addition to the current NTAS “Alerts” and, when issued, will be sent out widely through social and mainstream media.
Download the rest of the article in PDF format – Department of Homeland Security – NTAS Advisory System Update