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US Subsurface Blast Simulation Targeting China's Alleged Nuclear Testing
The US conducted a non-nuclear underground experiment explicitly tied to suspicions that China secretly conducted a low-yield nuclear test in 2020, an accusation Beijing denies, signaling rising US-China tension over nuclear arms control verification.
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The US Department of Energy announced on Wednesday that the National Nuclear Security Administration (NNSA) conducted a 'subsurface, non-nuclear chemical high-explosive' experiment at the Nevada National Security Site, aimed at enhancing the US's ability to detect low-yield nuclear explosions (SCMP, October 2). The experiment was explicitly linked by US officials to a test Washington suspects China carried out in 2020 — an accusation Beijing denies (SCMP, October 2). The development reflects escalating US concern over alleged secret Chinese nuclear testing activity and ongoing efforts to strengthen detection capabilities.