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.
Barnhart is a census-designated place (CDP) in Jefferson County, Missouri, United States. The population was 6,631 in the estimated 2007 census. It was 6,108 at the 2000 census.