A large number of my friends born in 55-6-7 in Western North Dakota have died of cancer. Hmmmmmm. Maybe coincidence, maybe not...(plumbob tests)
The worst of Plumbbob was the test code named "Hood". While the DoD/DoE said that all of the tests in Nevada were low yield, non-thermonuclear, Hood was actually a thermonuclear test. Due to its fairly high yield (74 kilotons, the largest atmospheric test done at the NPG) and the fact that most of its energy didn't come from the fusion boost, it produced a very large amount of radioactive fallout. Also, Plumbbob was the largest series of atmospheric tests ever conducted within the continental United States so there were far more detonations creating fallout than any other series.