In this episode of "Person to Person with Norah O'Donnell," O'Donnell sits down with Boston Marathon bombing survivor Adrianne Haslet about what it was like to finish the world's longest-running marathon twice after losing her leg, how she prioritizes her mental health and what's in store for this year's race. 

In this episode of Person to Person with Norah O'Donnell, O'Donnell speaks with Luke Russert about the passing of his father, beloved newsman Tim Russert, and his travels to 67 countries over three years - which are documented in his new book "Look For Me There: Grieving My father, Finding Myself."