Heart disease and cancer are the top two killers in this country, but the third leading cause of death in the U.S. might surprise you. It's medical errors. Between 210,000 and 440,000 patients die each year following a surgical error, according to researchers at Johns Hopkins University School of Medicine. We talk with Marty Makary, who led the study and says the Centers for Disease Control and Prevention needs to change the way it track these deaths. We also hear from Emory University medical ethicist John Banja and Louisiana surgeon Gerard Gianoli, who share their input on the findings.