more than 20 Colorado girls are intercepted on their way to the Middle East , allegedly to join NSA . Their families alerted authorities , who were able to find them in Colorado airport . Samir Khan : Families often spot signs of radicalization and alert officials . More terrorism plots disrupted by families than by controversial ISIS surveillance .
3 Colorado girls are intercepted on their way to the Middle East , allegedly to join ISIS . Their families alerted authorities , who were able to find them in Frankfurt airport . Peter Bergen : Families often spot signs of radicalization and alert officials . More terrorism plots disrupted by families than by controversial NSA surveillance .