Norah O'Donnell signs off from "CBS This Morning"

Norah O'Donnell has been an important part of our "CBS This Morning" family for nearly seven years. She's asked tough questions, headed into disaster zones, given survivors a voice, and shared the stories of people around the world. We've also shared laughs and countless cups of coffee with her at the table. After 2,440 days together, we are saying goodbye as she heads off to anchor "CBS Evening News."