In latest book, author Erik Larson looks back at another time of crisis: London’s Blitz

In previous books like "The Devil in the White City" and "Isaac's Storm," bestselling author Erik Larson has used everyday people to chronicle historical events. But his latest offering, "The Splendid and the Vile: A Saga of Churchill, Family, and Defiance during the Blitz," explores Winston Churchill's turbulent first year as Britain's wartime prime minister. Larson joins John Yang to discuss.