Could a ‘Paris-type’ attack happen in the U.S.?

In the U.S., FBI director James Comey says he is not aware of any credible threats of what he calls “Paris-type” attacks or of any U.S. connections among the Paris attackers. At the same time, Comey said the FBI currently has 900 open inquiries into Islamic extremists in the homeland. Matt Apuzzo of the New York Times joins Megan Thompson for more on domestic threats.