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![ORNL retiree Duane Starr and his wife, Nancy, pose with the critical frequencies demo unit Duane designed, built and donated to the laboratory to support nuclear workshops. Credit: Carlos Jones/ORNL, Dept. of Energy](/sites/default/files/styles/list_page_thumbnail/public/2023-12/2023-P06566.jpg?h=036a71b7&itok=tIETe2jc)
For years, Duane Starr led workshops at ORNL to help others from across the U.S. government understand uranium processing technologies. After his retirement, Starr donated a 5-foot-tall working model, built in his garage, that demonstrates vibration harmonics, consistent with operation of a super critical gas centrifuge rotor, a valuable resource to ongoing ORNL-led workshops.
![Former ORNL Director Thom Mason presents Tom Kollie with a National Intelligence Meritorious Unit Citation on behalf of James Clapper, former director of national intelligence, and the national intelligence community in June 2017. Credit: Jason Richards/ORNL, U.S. Dept. of Energy](/sites/default/files/styles/list_page_thumbnail/public/2021-09/2017-P04637_1.jpg?h=b6236d98&itok=Riz5mhDe)
A 25-year career with the U.S. Navy, commanding combat missions overseas, brought Tom Kollie back to where he came from — ready to serve his country in a new way.