Leak discovered at Japanese nuclear fuel laboratory

Atomic power
In this photo released by Greenpeace, a drone resembling the character of Superman flies over the nuclear power plant of Le Bugey, central, France, Tuesday, July 3, 2018. The environmental activist group says the drone was harmless but the action showed the lack of security in nuclear installations in France, which is heavily dependent on atomic power. (Nicolas Chauveau/Greenpeace via AP)

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