Frank Capra is best known for the movies “It’s a Wonderful Life” and “Mr. Smith Goes to Washington,” but he also made films about global warming and solar energy more than 50 years ago. Capra’s interest in science comes to life in “The Unchained Goddess,” as well as the 1938 film “You Can’t Take it With You.” Frank Capra biographer Joseph McBride talks with host Jeff Young about Capra’s frustrated scientific ambitions.