Where can I watch Railroad Alaska in United States?

Following an elite crew of workers-- brakemen, engineers, construction crews, mechanics and train drivers – Railroad Alaska illustrates the battle against ferocious weather and treacherous terrain to keep the State of Alaska’s critical 500-mile long railroad rolling to deliver life sustaining supplies. From controlled avalanches to prevent catastrophe, to fascinating characters, like Jim James, the one-handed handy man, learn what it takes to keep this train on track.