Goshi Hosono, nuclear crisis minister, said, "Removal of spent nuclear fuel from a seriously damaged nuclear reactor building is a challenge that no one in the world has faced before."

核问题担当大臣细野豪志表示：“从一栋遭严重破坏的核反应堆大楼移走废弃的核燃料是一个之前世界上无人遇到过的挑战。”

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Government spokesman Goshi Hosono said the latest setback would not affect the deadline.

BBC: Japan nuclear: Tepco halts Fukushima cooling plan

Such people might include Goshi Hosono, Mr Kan's 39-year-old Mr Fix-it who this week was appointed minister in charge of the nuclear mess.

ECONOMIST: The unfathomable Naoto Kan defies both friends and enemies