Twenty-five years after 9/11, lone actors radicalized online have replaced al Qaeda's complex plots as the greatest terrorism threat to the homeland.
https://www.foxnews.com/world/america-built-fortress-after-9-11-threat-started-hiding-plain-sight
https://www.foxnews.com/world/america-built-fortress-after-9-11-threat-started-hiding-plain-sight