In a series of articles in VG, he showed that heavy water produced by Norsk Hydro had ended up in Indian nuclear reactors used for the production of nuclear weapons.
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The revelation led to an international investigation by the Norwegian Police Security Service.
Arild Aspøy's Kjæresten fridde på dopapir: Se og Hør og kampen om privatlivet (1995; ISBN 9788203261091) explores issues of privacy raised by the magazine's editorial practices.