Dr. Bill Johnson (left), Ciambrone Radiochemistry Laboratory senior scientist, explains the science of trace-level analysis of environmental samples to U.S. Rep. Bill Posey from Florida’s 8th Congressional District as Posey’s District Director Patrick Gavin looks on. The samples are analyzed using radiochemistry and mass spectrometry for low levels of nuclear materials. Posey and members of his staff visited the Air Force Technical Applications Center, Patrick AFB, Fla., for a mission update April 11, 2017. (U.S. Air Force photo by Susan A. Romano)
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