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Upgrades to a nuclear-weapon test facility in Nevada are falling further behind schedule, government officials and weapon-site managers said Wednesday. Officially called Enhanced Capability for Subcritical Experiments (ECSE), the upgrades involve expanding the Nevada National Security Site’s U1a underground complex and installing a sophisticated new X-Ray camera to measure explosive plutonium tests. The expansion has slipped about a year since the Department of Energy’s National Nuclear Security Administration (NNSA) set the schedule last summer and the equipment could be three…
