Chapter 450 A Steamed Bun Causes Global Turbulence?

North America, a deeply buried steel castle of doom.

The so-called Doomsday Castle is the underground survival command base built by the US and the Soviet Union during the Cold War to prevent each other's nuclear attack.

The Doomsday Castle is hundreds of meters underground, and the large Doomsday Castle can accommodate at least hundreds of thousands of people to live, produce and live in it.

The Doomsday Castle is the highest security fortress in the United States. It has five or six hundred meters of granite on its head, and several meters of three layers of uniform steel armor protection. Even if a hydrogen bomb falls on its head, it can withstand several waves.

At the core of the steel castle