Thiokol Promontory Complex, Utah

Thiokol builds NASA’s space shuttle rocket boosters at this isolated facility near the Promontory Mountains. Other defense and propulsions systems are developed and tested here by Thiokol, on this major R&D and production site, part of which was once designated as “Air Force Plant 78.” Systems produced here include the solid fuel rocket motors for many of the ICBM vehicles still in use today, launchable from silos or submarines, as well as warheads and other missile components. Around 3,000 people work in 450 buildings, clustered in the various industrial and test areas, scattered throughout the bare hills of the nearly 30 square mile complex. Thiokol (renamed ATK Launch Systems Group in 2006), is now a division of Alliant Tech Systems (ATK), based in Minneapolis. In addition to being the world leader in solid-fuel rockets, ATK is the nation’s largest manufacturer of ammunition.