MarsNews.com

Twin rover launches will carry plutonium Florida Today

NASA says risk minimal, but opponents say the government downplays threat. 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.