Fukushima disaster: Inside Japan's contamination zone

On 11 March 2011 an earthquake and tsunami killed more than 15,000 people in Japan.

It also caused a meltdown at the Fukushima nuclear plant, which left the region severely contaminated and forced more than 160,000 residents to leave their homes.

It was the worst nuclear disaster since Chernobyl in 1986.

Rupert Wingfield-Hayes reports from the contamination zone, where a clean-up operation is still under way.