2019 National Terrorism Advisory System Bulletin (1/18/19) 2018 National Terrorism Advisory System Bulletin (5/9/18) 2017 National Terrorism Advisory System Bulletin (11/9/17) National Terrorism Advisory System Bulletin (5/15/17) 2016: National Terrorism Advisory System Bulletin (11/15/16) National Terrorism Advisory System Bulletin (6/16/16) 2015: National Terrorism Advisory System Bulletin (12/16/15) National Terrorism Advisory System Bulletin Fact Sheet (12/16/15)