Secret Chinese SUBMARINE Spotted by US SATELLITE

Just under one hundred years ago, submarines were extremely expensive and only available to the world's two largest countries, the USSR and the USA. But they quickly became an invaluable part of a country's navy.
Over time, every developed country armed itself with a couple submarines, sometimes even a few dozen nuclear submarines, to defend the integrity of its borders.
Today, we will try to mention the most unusual submarines that ever existed.
You'll hear about the most expensive underwater vessel and new stealth technology made by Swedish engineers and see a concept of the most innovative French submarine to this day that is a game-changer which combines designer ideas and military craftsmanship.
Is it possible to make a vessel absolutely invisible to enemy radar and execute a flank attack by sending a landing party right into the water and why has China already surpassed America in its naval strength? The answers to these questions are coming now!
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