911 Calls From Tragic Frozen Freeway Pile-up Released

Frantic drivers called 911 during the horrific pile-up along frozen I-35W in Fort Worth. Six people were killed and more than 130 cars and trucks collided on the icy freeway. NBC 5’s Lili Zheng has the harrowing calls from drivers, and the reaction from first responders on how the situation could be handled differently if it happens again.