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Photo by John Wagner
National Oceanic and Atmospheric Administration scientists Karl Froyd, left, and Troy Thornberry move a mass spectrometer from NOAA’s P3 jet to perform routine maintenance Monday, April 14, 2008, in an Everts Air hangar. Scientists with NOAA, the National Aeronautics and Space Administration and the Department of Energy are in town to study pollution concentrations in Northern regions which are contributing to global climate change.