As a 25-time professional wrestling champion and WWE star, John Cena is known for his famous punishing move called the “attitude adjustment.” But he is also an actor, rap musician, best-selling author and granter of more than 600 wishes to children at the Make-A-Wish Foundation, and a role model to kids everywhere. In this week’s “Sunday Sitdown,” Willie Geist talks to Cena about his latest children’s book and how his life’s journey has been based on one motto: Never Give Up.