Wow, that's quite an accident.
Palomares is in Spain. Fifty years later, it's still an issue for the people living there.
“Despite the cost and the number of personnel involved in the cleanup, traces of contamination remained forty years later. Snails were observed with unusual levels of radioactivity.[31] Additional tracts of land were also appropriated for testing and further cleanup. However, no indication of health issues has been discovered among the local population in Palomares.[29]”
Human cancer that is, although I do feel for the snails.
They eventually were forced to land because their engine was down on power from lack of maintenance.
There's probably a better reference for this.