"This updated edition of the essential collection of historic writings by pre-eminent scientists and historians who bore witness to the birth of the modern nuclear age now includes President Barack Obama's 2016 statement at Hiroshima, all-new writings from Japanese survivors of the atomic bomb, and a new preface by Cynthia C. Kelly"-- Provided by publisher.

Section one : Explosive discoveries and bureaucratic inertia -- Section two : An unprecedented alliance -- Section three : An extraordinary pair -- Section four : Secret cities -- Section five : Secrecy, intelligence and counterintelligence -- Section six : The Trinity test -- Section seven : Dropping the bomb -- Section eight : Reflections on the bomb - Section nine : Living with the bomb - Section ten : Seventy-five years later.