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.
Hayden is a town in Gila and Pinal counties in the U.S. state of Arizona. According to 2006 Census Bureau estimates, the population of the town is 843. The economic base of Hayden's economy is the Hayden Smelter.