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OBS Chief
Saw this series on a channel called Destination America last night. Fun to watch if you're a railfan. Unfortunately, it doesn't look like they are streaming full episodes online, but there are some short clips. It does make you appreciate all the work required to make a railroad run smoothly.
http://america.discovery.com/tv-shows/railroad-alaska/railroad-alaska-videos/sneak-peek.htm
http://america.discovery.com/tv-shows/railroad-alaska/railroad-alaska-videos/sneak-peek.htm