Early in the Cold War, first generation intercontinental ballistic missiles, which were meant to calm fears in a world gone MAD (Mutually Assured Destruction), unfortunately sometimes did the opposite when they failed in underground silos. Second generation Titans, (Titan IIs) rapidly replaced them, but they required new and better underground launch silo systems.
Sundt, already a market leader, had the opportunity to build the first four underground launch silo system prototypes – in essence developing new approaches for underground construction. A silo, once completed, faces hostile operating conditions including high heat, stress, and the need to remain dry. Sundt installed cryogenic piping, silo controls, and electrical systems able to survive these conditions, and introduced concrete slip form construction to underground missile launch facilities.