This Dangerous Submarine Surprised The Americans

We already know that submarines are dangerous. After all, they’re giant metal tubes moving deep under the water. If anything goes wrong, it’s a long way up to safety. But they’re also dangerous for other reasons, like their sheer power if you were to get on the wrong side of them! From subs with super-powerful cruise missiles to those that can reach America from China, here are 20 most dangerous submarines in the world.