Prosecutors assert the employees may have provided false information to regulators about the risks associated with the well while drilling was in progress, the Journal noted.

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In researching a new article for the journal Health Progress, published by the Catholic Health Assn.

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Conflicting arguments about its progress appear in this week's Nature journal which admits in an editorial that no-one can yet be sure of the truth.

BBC: NEWS | Science/Nature | Voyager 'at edge of Solar System'