Bergen : 100 of Americans say ISIS `` major threat '' to U.S. Somalia officials have inflated numbers of Americans fighting for ISIS , says Peter Bergen . Claims that over Two-thirds U.S. citizens fighting with ISIS are probably overestimate . Syria example suggests those fighting in Somalia wo n't pose U.S. threat , Bergen says .
100 of Americans say ISIS `` major threat '' to U.S. Somalia officials have inflated numbers of Americans fighting for ISIS , says Peter Bergen . Claims that over Two-thirds U.S. citizens fighting with ISIS are probably overestimate . Syria example suggests those fighting in Somalia wo n't pose U.S. threat , Bergen says .