Web extra: Filming Jimmy Stewart and Donna Reed's "It's a Wonderful Life" kiss

In this web exclusive, Hollywood historian Sam Wasson, author of the biography "Frank Capra: A Life," talks with Lee Cowan about Jimmy Stewart and Donna Reed's emotional performance in Capra's 1946 classic "It's a Wonderful Life," and how the director created a timeless classic – even if it wasn't the box office giant he'd hoped for.