I will dare say that those nuke tests have been the cause of more American premature deaths than the casualties of Hiroshima and Nagasaki. Choking out from cancer over the decades isn’t as striking as shadows on stone walls and burn ward photos.
https://www.epa.gov/radiation/radiation-sources-and-doses
Average U.S. Doses and Sources
All of us are exposed to radiation every day, from natural sources such as minerals in the ground, and man-made sources such as medical x-rays. According to the National Council on Radiation Protection and Measurements (NCRP), the average annual radiation dose per person in the U.S. is 6.2 millisieverts (620 millirem)
PLUS, plenty of atmospheric radioactive fallout from 1940s through 1961.
You know, IN ADDITION to all that natural stuff.