This book is a history of the evolution of Pakistan's nuclear weapons management system, including its nuclear doctrine and the measures in place to secure and safeguard them. This work highlights the elements that went into the formulation of Pakistan's nuclear policy. The book's great significance lies in the fact that it tackles the little known subject of nuclear learning most comprehensively in all its dimensions. With great clarity and balance, the author clearly highlights the discernible aspects of Pakistan's learning experience and establishes beyond doubt that Pakistan has learnt from crises events and has evolved into a responsible nuclear weapons state with effective command, control, and custodial arrangements in place.