Marc Knapper, Embassy Seoul deputy chief of mission, receives a tour on board the NASA DC-8 that is part of the Korea United States-Air Quality (KORUS-AQ) Experiment at Osan Air Base, Republic of Korea, April 29, 2016. KORUS-AQ will deepen the understanding of the processes controlling air quality, improve knowledge of the challenges facing satellite observations of air quality and improve the ability of models to forecast and assess air quality conditions. ( Air Force photo by Staff Sgt. Jonathan Steffen/Released)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Model Released: No

Keywords: air, force, usaf