As South Korea prepares to host the Winter Olympics, it has been eager to get the North to participate. What is Seoul afraid will happen if it won’t? And, for 38 minutes on Saturday morning, people in Hawaii believed that a missile was headed for the state. Guest: Susan Chira, a Times journalist who covered Asia in the 1980s, when South Korea hosted the Olympic Games for the first time; voice mail messages from people who received a false alert about an incoming missile attack in Hawaii. For more information on today’s episode, visit nytimes.com/thedaily.