Dr. Robert Corell, Arctic Environmental Expert, speaks with Air Force senior leaders about the ever-changing climate in the Arctic Circle in Illulissat, Greenland, Sept. 12, 2017. The senior leaders were in Greenland, Canada and Alaska, as part of Operation Uggianaqtuq, an Arctic Expedition to better understand the challenges of working in the climate and to build relationships with allies and partners there. ( Air Force photo/Tech. Sgt. Dan DeCook)

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Keywords: air, arctic, expedition, force, operation, security, uggianaqtuq