Earl Foote, founder of Nexus IT, explores the world of current cyber threats and technology trends. (1:01)
Then, National Magazine Award-winning journalist Susan Casey explores her new book about the hidden abyss that is the deep ocean, "The Underworld: Journeys to the Depths of the Oceans." How much lost history is down there? How much knowledge and how many geological marvels and undescribed species? (25:08)