The 1984 Midwest pipe bombing involved a series of pipe bomb planted by Earl Steven Karr (who was later arrested in Iowa) in Minnesota, Illinois and Wisconsin, and thankfully only is known to have injured one individual.
The 1984 Midwest pipe bombing was a plot involving a series of pipe-bombs planted in Minnesota, Illinois and Wisconsin, by Earl Steven Karr. Only one person is known to have been injured by his explosives. 
