Two bombs over Japan. Two shells. One called Little Boy, one called Fat Man. Three days apart. The one implicit in the other. Brothers. Named one of Flavorwire'

"Nuclear weapons, since their conception, have been the subject of secrecy. In the months after the dropping of the atomic bombs on Hiroshima and Nagasaki, the

A "behind-the-scenes account of the 116 days leading up to the Americans attack on Hiroshima"--Dust jacket flap.

**Winner of the Pulitzer Prize, the National Book Award, and the National Book Critics Circle Award** The definitive history of nuclear weapons—from the turn-