Gopher Ordnance Works

In 1945, a massive munitions plant opened south of Minneapolis to produce smokeless gun powder to supply the US forces fighting in World War II.Image: World War II artillery crew of a heavy 155mm gun [credit: Wikpedia. This file is a work of a U.S. Army soldier or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.]