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190306-N-UI176-043 WASHINGTON (March 6, 2019) Research physicist and head of the U.S. Naval Research Laboratory’s Charged Particle Physics Branch Bill Amatucci stands in front of the source chamber section of the Space NRL Physics Simulation Chamber. (U.S. Navy photo by Jonathan Steffen/Released)

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Photo by: Jonathan Steffen |  VIRIN: 190306-N-UI176-043.jpg