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You-Deog Hong, Air Quality Research Division director, Climates and Air Quality Research Department, gives an overview of Korea United States-Air Quality (KORUS-AQ) Experiment during a media day at Osan Air Base, Republic of Korea, April 29, 2016. KORUS-AQ is a step toward an international effort to develop a global air quality observation system that will include satellites from both countries and a network of surface monitoring sites, models, and airborne sampling. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen/Released)
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