Using a contextual, inside-outsider perspective, this study of mobile intercontinental ballistic missiles (ICBMs) addresses a gap in the history of American technology. An unheralded part of space history, mobile ICBM research complemented the deployment of operational ICBMs in seventeen American states. A child of systems engineering, a powerful innovation that extended human capabilities to research, develop, operate, maintain, and sustain complex technological systems, ICBMs were and remain a system blending ...