Other formats and full transcript can be found at: http://gallery.usgs.gov/videos/197, http://gallery.usgs.gov/videos/198, http://gallery.usgs.gov/videos/199…
Other formats and full transcript can be found at: http://gallery.usgs.gov/videos/197, http://gallery.usgs.gov/videos/198, http://gallery.usgs.gov/videos/199…
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