What was the fallout from Fukushima?

When a tsunami hit the nuclear plant, thousands fled. Many never returned – but has the radiation risk been exaggerated?Shunichi Yamashita knows a lot of about the health effects of radiation. But he is a pariah in his home country of Japan, because he insists on telling those evacuated after the 2011 Fukushima nuclear accident that the hazards are much less than they suppose. Could he be right?Yamashita was born in Nagasaki in 1952, seven years after the world’s second atomic weapon