Power Shift is the first comprehensive account of the US Navy's Submarine Force transition from diesel to nuclear power. It represented the biggest, most costly and disruptive technological change in naval history. This was all done against the backdrop of intense Cold War operations where US submarines played a critical role in maintaining the peace. The story is told by the people who were part of the power shift. From seamen to admirals they tell the stories of how the technological and cultural changes affected them.