As the last lifeboat left the side of Titanic, there were tragically 1,500 souls remaining on the ship. How It Really Happened with Jesse L. Martin investigates the Titanic in a special two-hour episode - Sunday at 9p ET/PT on CNN. | CNN Original Series

Frederick Fleet, who survived the Titanic sinking, called down and said, “Iceberg dead ahead.” How It Really Happened with Jesse L. Martin investigates the Titanic in a special two-hour episode Sunday at 9p ET/PT on CNN. | CNN Original Series

Uncover the true story behind the devastating terror attack in this gripping and emotional CNN Original Series. | CNN Original Series