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Maj. Andrew A. Clack and Spc. Jasmine A. Crewell from the U.S. Army's 1st Area Medical Laboratory Occupational and Environmental Health Section observe in-field analysis at a sample receiving table-lab. Soldiers from the 1st Area Medical Laboratory trained with South Korean troops from the Republic of Korea Chemical, Biological, Radiological, Nuclear (CBRN) Defense Command at their headquarters outside of the South Korean capital of Seoul. (Photo Credit: Courtesy photo)