Claudia Granger, a Ciambrone Radiochemistry Laboratory mass spectrometry technician, fills a liquid nitrogen trap in a thermal ionization mass spectrometer. Granger is one of more than 1,000 people assigned to the Air Force Technical Applications Center at Patrick Air Force Base, Fla., the Department of Defense’s sole nuclear treaty monitoring center. (U.S. Air Force photo/William B. Belcher)
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