I hate to be that one idiot to say politics online, but..
Vault Tec is the foremost builder of state of the art underground fallout shelters. Vaults, if you will. Luxury accomindations, where you can wait out the horrors of nuclear devastation. If you haven't noticed, this country has gone heck in a handbasket, if you wll excuse my langauge. The big kaboom is inevitable, I'm afriad. And coming sooner than you may think. If you catch my meaning. I'm here to to tell you that you have been preselected into the local vault! Vault 111!