> reporter: when was this last operational? >> 1967. >> over there is where the launch controllers would sit with their keys and"> > reporter: when was this last operational? >> 1967. >> over there is where the launch controllers would sit with their keys and" property="og:description"> > reporter: when was this last operational? >> 1967. >> over there is where the launch controllers would sit with their keys and">
"titanic." it was sealed. >> reporter: when was this last operational? >> 1967. >> over there is where the launch controllers would sit with their keys and the codes waiting for the order. this is the missile silo, and it is a deep, deep hole. listen to the echo. hello! it's a long way down. a place built with the apocalypse in mind. today, the threat may be different, but the fear remains. the good news is, for some, the accommodations will be a lot more plush. i'm david wright for "nightline" at ravens ridge, kansas. >> well done, david wright, huh? that was compelling. >> a great piece. who knew. they sold out? who is -- people really -- you