Since 2014, 19,000 people have gone missing while attempting to cross the central Mediterranean from Libya to Italy, according to the Missing Migrants Project. A new book examines how a deal between the European Union and Libya has helped stop migrants and refugees from across Africa and forced them to remain in the country’s detention system. Host Marco Werman spoke with Sally Hayden, the author of “My Fourth Time, We Drowned: Seeking Refuge on the World’s Deadliest Migration Route.”