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V.C. Wald: Chip Jenkins, Superintendent, Grand Teton National Park
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V.C. Wald: Cam Sholly, Superintedent, Yellowstone National Park
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V.C. Wald: Doug Smith with Cam Sholly
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V.C. Wald: Doug Smith, speaker
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V.C. Wald: Old Faithful Lodge and Old Faithful geyer (between eruptions)
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V.C. Wald: Old Faithful Inn
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V.C. Wald: Big twigs
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V.C. Wald: Old Faithful Geyser, between erruptions
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V.C. Wald: Pump Geyser with its runoff channels and pools
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V.C. Wald: Pump Geyser, pausing briefly before erupting more visibly
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V.C. Wald: Pump Geyser
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V.C. Wald: Teakettle Spring
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V.C. Wald: Sponge Geyser, and its neighborhood
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V.C. Wald: Thermal runoff channel
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V.C. Wald: Beach Geyser
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V.C. Wald: Down on the boardwalk
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V.C. Wald: Ear Spring
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V.C. Wald: Arum Geyser
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V.C. Wald: Arum Geyser
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V.C. Wald: Anonymous, details
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V.C. Wald: Anonymous
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V.C. Wald: Good evening