Ten years on, Fukushima nuclear disaster clean-up challenges include future natural disaster risks

Ten years ago, on March 11, 2011, a 9.0 magnitude earthquake triggered a towering tsunami that killed some 18,500 people and set off Japan's worst nuclear calamity along the east coast of Fukushima prefecture. But a decade after the triple reactor meltdown at the Fukushima Daiichi nuclear plant, its operator, Tokyo Electric Power Co, and the Japanese government have a long way to go in their 30-year plan to decommission the wrecked facility.