@zbecker@histodons@sts Air bursts cause radioactive fallout unless they are detonated high in the upper atmosphere. There was a lot of radioactive fallout in both Hiroshima and Nagasaki. Many people in the areas where the fallout came down developed a range of diseases.
Here in Hiroshima their exposures have finally been legally recognized and those who were exposed to the fallout (called Black Rain here) have been given special rights to medical care specifically focused on radiogenic diseases.