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Through Engineering Campaign funding, Engineering Sciences Center 1500 has developed a test capability to simulate flight conditions of launch through reentry into a single ground-based test. The combined environment test capability, named Superfuge, has demonstrated synergistic effects for several test units when environments such as vibration and acceleration were applied simultaneously. These effects were significant and indicate the need for such testing to capture correct system response. Also, the ability to perform margin assessment under more realistic flight conditions has been realized with this new capability. (1500) NWA closely coupled effort between the weapons and science and technology communities has resulted in a multidisciplinary effort to develop a high-fidelity, three-dimensional predictive modeling and simulation tool for neutron tube performance. This effort is focused on capabilities addressing design, qualification, and issue resolution. As part of an Advanced Simulation & Computing Level 2 milestone, Sandia has completed the first three-dimensional neutron tube plasma transport simulations, enabling qualitative assessment of critical performance parameters. (1100, 1400, 1500, 2700, 9300) NW