Imagine being trapped in a submarine as gallons of water begin pouring in. There is no escape. In today's educational animated cartoon we look at the daring rescue mission to save the crew of the sinking USS Squalus. | The Infographics Show

Stealthy and absolutely deadly, submarines are a navy's worst nightmare...and the world has seen some very large submarines. But which is the biggest submarine ever built? Join us as we go back to the end of the Cold War to investigate, in this episode of The Infographics Show, the largest submarine ever built. | The Infographics Show