A few months before aviator Charles Lindbergh made his record-breaking transatlantic flight, Northwest Airways, Inc. began carrying airmail between the Twin Cities and Chicago. As Northwest Airlines, Inc., the company became a major international carrier before financial troubles forced its merger with Delta Air Lines, Inc. in 2008.

The Cuyuna Iron Range is a former North American iron-mining district about ninety miles west of Duluth in central Minnesota. Iron mining in the district, the furthest south and west of Minnesota’s iron ranges, began in 1907. During World War I and World War II, the district mined manganese-rich iron ores to harden the steel used in wartime production. After mining peaked in 1953, the district began to focus on non-iron-mining activities in order to remain economically viable.