 Derry and Latrobe were also linked by the "Westmoreland County Railway Company" which was an interurban (long-distance trolley) operating from 1904 to 1932.A helicopter crash into a crowd assembled for a festival at St. Joseph's Catholic Church in Derry killed eight people and injured 18 others on Labor Day, 1978.The railroad crossing in downtown Derry has also been the site of other fatal accidents.