https://apnews.com/d1b8322355f3f31109dd925900dff200

TOKYO (AP) — Japan on Friday revised a roadmap for the tsunami-wrecked Fukushima nuclear plant cleanup, further delaying the removal of thousands of spent fuel units that remain in cooling pools since the 2011 disaster. It's a key step in the decadeslong process, underscoring high radiation and other risks. The government and the plant operator, Tokyo Electric Power Co., still keep a 30- to 40-year completion target.

A look at some of the challenges: