A small group of evacuees have briefly been allowed inside the exclusion zone around Japan’s damaged Fukushima nuclear plant. For the first time, the government gave permission for short visits so people could gather belongings and check on their properties. Meanwhile, a recent map of contamination released by Japan shows high levels of radiation well outside the evacuation zone. Dr Robert Jacobs can help shed more light on this. He’s a Research Associate Professor of Nuclear History and Culture at the Hiroshima Peace Institute.