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Keywords from Image Description:
operation windchill operationwindchill thule greenland usaf douglas gloemaster usafdouglascgloemaster SDASM.CATALOG Balchen SDASM.TITLE Operation Windchill SDASM.DATE SDASM.LOCATION Thule Greenland SDASM.COLLECTION Bernt Balchen Collection SDASM.TAGS Operation WindchillThule Greenland PUBLIC COMMONS.SOURCE INSTITUTION San Diego Air