What kinds of challenges had to be overcome in building-up the IMS, starting in the late 1990s?

The CTBTO Verification Regime is one of the most ambitious global projects ever undertaken and there were many political, environmental, and administrative challenges. To give two examples:

1. Technical challenges: The radionuclide network was the first of its kind to be created on a global scale and robust equipment had to be designed to operate reliably in remote and isolated locations where technical expertise was scarce;

2. Logistical challenges: Special procedures had to be designed to send sensitive samples from radionuclide stations to IMS network laboratories for evaluation.

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