The apparent lack of chatter before terrorists carried out a string of deadly attacks across Paris may indicate a dangerous change in the way extremist groups are communicating with each other
The apparent lack of chatter before terrorists carried out a string of deadly attacks across Paris may indicate a dangerous change in the way extremist groups are communicating with each other. NYPD Deputy Commissioner for Intelligence and Counterterrorism John Miller discusses that and how New York City is preparing for similar threats.