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On May 14, the Lawrence Livermore National Laboratory completed the first in the Nimble series of underground subcritical experiments at the Nevada National Security Site, according to a press release. The subcritical experiment was conducted at the Principal Underground Laboratory for Subcritical Experimentation, also known as the U1a Complex. In June 2023, a senior Livermore official told the Monitor that Nimble was a three-shot series of experiments, the first of which was called Nob Hill and scheduled to fire in…
