William Johnson, 633rd Medical Support Squadron laboratory technical superintendent, examines a specimen at Langley Air Force Base, Va., Jan. 14, 2014. The laboratory examines blood cultures for numerous bacterial infections. Johnson hails from Berea, Ky. (U.S. Air Force photo by Senior Airman Brittany Paerschke-O’Brien/Released)
Senior Airman Brittany Paerschke-O'Brien
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