| http://www.w3.org/ns/prov#value | - Some governments, at least including the US, various UK states such as Canada and Australia, the PRC, and some continental European powers, have had agents working full time on just getting samples of radionucleotides from various fission plants, and analyzing those samples so that, if those nucleotides turn up in a dirty bomb or worse, an actual fission device, they can tell just where they were
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