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Davis Sebree, a technician at the U.S. Air Force Radiochemistry Laboratory at Patrick Space Force Base, Fla., uses an Alpha/Beta Survey Meter to check for potential contamination on the hands of Dr. Robert Floyd, Comprehensive Nuclear-Test-Ban Treaty Organization Executive Secretary. Floyd was appointed as CTBTO’s top leader in August 2021, and this was his first trip to the nuclear treaty monitoring center. (U.S. Air Force photo by Matthew S. Jurgens)
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