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The U.S. National Nuclear Security Administration (NNSA) confirmed Wednesday that Stephen Younger will retire as director of the Sandia National Laboratories in New Mexico effective Dec. 31, after two years managing the nation’s nuclear-weapon engineering laboratory. The local Albuquerque Journal reported the news first, on Tuesday. "I am profoundly grateful to Dr. Younger for his exceptional leadership at the helm of Sandia National Laboratories,” NNSA Administrator Lisa Gordon-Hagerty said in a statement. “During his tenure as Labs Director, he has…
