Tracy Walder, former CIA and FBI agent, tells NewsNation you can’t kill an “intangible idea” like al-Qaida and ISIS. She says it’s just a matter of time before there is another terror attack in the U.S. #waronterror #alqaida #isis "NewsNation Prime" is America’s source for unbiased news offering a full range of perspectives from across the U.S. Weekends starting at 7p/6C. #Prime NewsNation is your source for fact-based, unbiased news for all America. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming: trib.al/Vu0Ikij