This short clip from History Channel's 'Extreme Trains' series shows the Juniata Locomotive Shop in Altoona, PA, where the Pennsylvania Railroad (1846-1968) built many of its steam and electric locomotives until the 1940's. After dieselization the shops continued as a heavy overhaul and repair facility for subsequently the Pennsylvania Railroad and its successors Penn Central (1968-1976), Conrail (1976-1999) and Norfolk Southern (1999-). In the late 90's it assembled a series of new heavy freigh