The American public is assumed to have overwhelmingly supported the use of atomic bombs on Japan, but this impression comes in part from a Gallup poll conducted just days after the bombs destroyed Hiroshima and Nagasaki. The poll found that eighty-five percent of Americans were in favor of the bombs. Only ten percent disapproved, and five percent were unsure. Those figures might suggest a deep current of hatred toward Japan, the depths of which can only be hinted at by polling data. But it must be considered along with another Gallup poll taken in June 1945, barely two months prior to the nuclear strikes. In this survey Americans were asked if they supported the use of poison gas against the Japanese, if doing so would reduce American casualties. Forty percent said yes, but almost fifty percent said no. As horrible as poison gas undeniably is, a nuclear bomb is vastly worse. This suggests that most Americans simply had no concept of what an atom bomb meant. This chapter examines what Americans actually thought about the bomb.