Of the nearly 1,000 FBI cases across the country looking at people who may have been radicalized at various levels, about 80 percent of them are tied to ISIS, FBI Director James Comey told reporters today.And while the number of Americans looking to travel to Syria or Iraq to join the terrorist group has diminished, online propaganda reaching followers around the world remains a serious threat, Comey said.Get real-time updates as this story unfolds. To start, just "star" this story in ABC News' phone app. Download ABC News for iPhone here or ABC News for Android here.



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