Drain the Oceans: Season 3, Episode 10 - ProjectFreeTV

3 - 10: Chicago

Draining Lake Michigan uncovers Chicago's secret history. The latest sonar technology exposes a catastrophe that kills 300, solves a tragic Christmas mystery, uncovers a game-changing naval training programme from World War 2 and reveals an engineering marvel that stops the fastest growing city in the world from choking to death.