NASA: Nuclear launches safer Florida Today

Eight penny-sized pellets of plutonium will ride inside each of the twin rovers blasting off from here for Mars this summer. NASA says that poses a 1-in-1,030 possibility of a radioactive accident near the launch site and, even in the worst-case scenario, the most exposed individuals would be subjected to less radiation than a single medical X-ray. Opponents say the government is downplaying the odds of an accident and its consequences. They say any amount of plutonium is too much and even the slimmest chance of a radioactive accident is not worth the risk.