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Developer: Kan. caverns could preserve human race

A reporter walks through a door to the Vivos Shelter and Resort during a tour of the facility in Atchison, Kan., Tuesday, June 18, 2013. (AP Photo/Orlin Wagner)

A reporter walks through a door to the Vivos Shelter and Resort during a tour of the facility in Atchison, Kan., Tuesday, June 18, 2013. (AP Photo/Orlin Wagner)

Paved roadways lead the way to the Vivos Shelter and Resort during a tour of the facility in Atchison, Kan., Tuesday, June 18, 2013. (AP Photo/Orlin Wagner)

Coby Cullins stands next to a scale model of the Vivos Shelter and Resort during a tour of the facility in Atchison, Kan., Tuesday, June 18, 2013. (AP Photo/Orlin Wagner)

Coby Cullins looks at a map of the Vivos Shelter and Resort during a tour of the facility in Atchison, Kan., Tuesday, June 18, 2013. (AP Photo/Orlin Wagner)

Coby Cullins stands on top a hill that covers the Vivos Shelter and Resort during a tour of the facility in Atchison, Kan., Tuesday, June 18, 2013. (AP Photo/Orlin Wagner)