About radiation: Let's say that the article is correct and the radiation risk is very low -- 6 to 100 additional cancer cases per year among the millions that f

About radiation: Let's say that the article is correct and the radiation risk is very low -- 6 to 100 additional cancer cases per year among the millions that fly. The question I have is this: Are the machines preventing 6 to 100 injuries or deaths from a terrorist attack every year? If so, then perhaps the extra cancer cases are worth it. But if not -- if the scanners do not reduce the risk of terrorist attacks enough to offset the very small increase in cancer cases, then the machines are a waste.