As an Australian Aboriginal person. Ask a farmer. Ask a Nuclear veterans. Have a gander at the independent medical research regarding latent periods. In regard to Japan, look at the crap being put out by the Fukushima Hospital regarding the latent period for thyroid cancer, 5 years they claim on the basis of what World Nukers claim. Double that identified by the US Centres for Disease Control, the Ukraine thyroid study, and at least two other independent medical centres of excellence.