external December 1, 2017 Jeffrey Treistman, assistant professor of national security, comments on the Islamic State terror group’s warnings of violence over the holiday season and how they need to be taken seriously. This article was also picked up by Free Republic and Guiame, a Brazilian media outlet. https://www.christianpost.com/news/isis-holiday-horror-christmas-blood-attack-warnings-must-be-taken-seriously-security-expert-208560/ news-all news-in-the-media year-2017 month-december