What If on MSN

The world’s biggest nuclear bomb is taken to the bottom of the Mariana Trench, and then it begins

Today we’re dropping a big bomb into the deepest part of the ocean. So grab a surfboard and get ready to hang ten on the ...
Dark Footage Official on MSN

An underwater nuclear bomb threw a wall of water 5,000 feet into the sky

Operation Hardtack I included some of the most dramatic nuclear experiments of the Cold War, but few created imagery as spectacular as the underwater test known as Umbrella. The device was detonated ...