Historian John Schmidt takes us back to Christopher Columbus’s fourth voyage to the Americas. Plus, President Obama’s plan to close Guantanamo has some questioning whether he intends to return it to Cuba. Many 2016 presidential candidates have weighed in on the issue. Alberto Coll of DePaul University joins us to discuss the debate around Guantanamo. Then we take a look at the new debt agreement and the Alberto Nisman case in Argentina with Peter Prengaman, the Southern Cone news editor of the Associate Press.

Guest: John Schmidt is a historian and author of the book “This Day in Chicago.”