Mount St. Helens
Mount St. Helens in the spring of 1980. The youngest and most active volcano in the Pacific Northwest, it had erupted for the past 50,000 years and had been especially active for 4,000 years.
Author: CBS News Staff
Credit: AP
Mount St. Helens in the spring of 1980. The youngest and most active volcano in the Pacific Northwest, it had erupted for the past 50,000 years and had been especially active for 4,000 years.
Author: CBS News Staff
Credit: AP
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