US needs to be on 'heightened alert' for sleeper cells: Former DHS official
Government
The former DHS assistant secretary for counterterrorism, Elizabeth Neumann, discusses potential threats to the U.S. amid the conflict with Iran. ––– Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G Watch 24/7 coverage of breaking news and live events on ABC News Live: https://www.youtube.com/watch?v=gN0PZCe-kwQ&ab_channel=ABCNews Watch full episodes of World News Tonight with David Muir here: https://youtube.com/playlist?list=PLQOa26lW-uI8ixlVw1NWu_l4Eh8iZW_qN&feature=
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