Two-thirds of Americans say ISIS `` major threat '' to U.S. U.S. officials have inflated numbers of Americans fighting for ISIS , says Peter Bergen . The New York Times reports that the number of American citizens who are actively engaged in terrorist activities is at least as high as it was before Sept. 11, 2001. When Americans leave for jihad . Somalia example suggests those fighting in Syria wo n't pose U.S. threat , Bergen says .
Two-thirds of Americans say ISIS `` major threat '' to U.S. U.S. officials have inflated numbers of Americans fighting for ISIS , says Peter Bergen . The New York Times reports that the number of American citizens who are actively engaged in terrorist activities is at least as high as it was before Sept. 11, 2001. Somalia example suggests those fighting in Syria wo n't pose U.S. threat , Bergen says .