November 20
| 1855 | The Mississippi River freezes over for the season, concluding a busy year during which 553 boats and 30,000 people traveled to St. Paul. |
| 1967 | The Nicollet Mall, a pedestrian walkway closed to traffic except buses, opens in downtown Minneapolis. Want to explore this and other events? Go to Timepieces. |
| 1969 | Indians of All Tribes (IAT), a group of activists including Adam Nordwall, a Minnesota Ojibwe, occupies Alcatraz Island in San Francisco. IAT intends to force negotiation with the federal government and to assert the need for Indian self-determination. Members of the group remain on the island until forcibly removed in 1971, bringing national attention to Indian issues. |
| 1979 | Artificial blood is used in the United States for the first time when Dr. Robert Anderson of the University Hospital injects Fluosol, a blood substitute developed in Japan, into a Jehovah's Witness individual who had refused a regular blood transfusion on religious grounds. |
The Events displayed are from
Disasters and Extreme Events
| 1953 | An ice storm in Lake Benton, Lincoln County, leaves a 3-inch coating of ice. |
The disasters and extremes events were compiled from Minnesota Historical Society collection sources, primarily Minnesota newspapers.
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