The British Mission to Japan documented the aftermath of the first major acts of aggression of the Nuclear Age. This survey of the attacks and the conditions they precipitated outlines the physics behind the action of the bombs, including the blast wave and penetrative radiation. The survival of different types of structures and their occupants is noted as an instruction in civil engineering and building in the shadow of the bomb, and as evidence of the variance of the blast effects relative to the centre of the explosion. It was hoped that such data could be used to anticipate the fate of Western cities should they suffer a similar assault, but the introduction also asserts its importance to the UN's campaign for "securing the control of atomic power for the common good and in abolishing the use of weapons of mass destruction". The report was the work of a team of scientists and engineers that included the mathematician and future broadcaster Dr Jacob Bronowski.