The One

 is a undetonated bomb in Fallout: New Vegas.

Characteristics
The One is an undetonated nuclear bomb found northeast of the Ranger Station Bravo. You can salvage components with a science skill of 60 or more. There are three super mutant masters near it(one with a missle launcher, one with a light machine gun, and one with a minigun/the weapons the mutants have may vary).