A mass tort is a civil action involving numerous plaintiffs against one or a few corporate defendants. The tort may involve, for example, personal injuries suffered by numerous plaintiffs as a result of a defective product, or a mass disaster in which there were many injured persons, such as an airplane crash, or exposure of a large group of people to toxic chemicals or pharmaceuticals.
Gann Valley is an unincorporated community in and the county seat of Buffalo County, South Dakota, United States. Although not tracked by the Census Bureau, Gann Valley has been assigned the ZIP code of 57341. The center of population of South Dakota is located in Gann Valley.