The "frankfurter" is born, the Holland Tunnel opens to traffic, the Supreme Court integrates Alabama's public buses, the Vietnam Veterans Memorial is dedicated, and water is found on the moon, all on this day.
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United States Geological Survey
1985: The volcano Nevado del Ruiz erupts and melts a glacier, causing a lahar (volcanic mudslide) that buries Armero, Colombia, killing approximately 23,000 people.