Erik Larson: Remembering the Lusitania

In its day, the Lusitania was one of the fastest and finest passenger ships in the world. But, one hundred years ago, when a German U-Boat sunk the Lusitania with almost 2,000 people aboard, it brought the United States to the brink of war. Author Erik Larson tells Steve Paikin the Lusitania's story and why it should be remembered.