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circa 1955: Two steam locomotive trains that travel from Vladivostok to Sloubliana on the Trans-Siberian railroad line. (Photo by Three Lions/Getty Images)

circa 1955:  Two steam locomotive trains that travel from Vladivostok to Sloubliana on the Trans-Siberian railroad line.  (Photo by Three Lions/Getty Images)

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A locomotive travels along snow covered tracks on the Trans-Siberian railroad in the Kemerovo region of Siberia near Yashkino, Russia, on Friday, Oct. 24, 2014. While Russia dodged being cut to junk by Standard & Poor's last week, the bond market is signaling mounting concern a downgrade is coming as economic growth sputters amid tumbling oil prices. Photographer: Andrey Rudakov/Bloomberg via Getty Images

A locomotive travels along snow covered tracks on the Trans-Siberian railroad in the Kemerovo region of Siberia near Yashkino, Russia, on Friday, Oct. 24, 2014. While Russia dodged being cut to junk by Standard & Poor's last week, the bond market is signaling mounting concern a downgrade is coming as economic growth sputters amid tumbling oil prices. Photographer: Andrey Rudakov/Bloomberg via Getty Images

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A Bashkir switch operator by the Transsiberian Railway line near the town of Ust-Katavin Chelyabinsk Oblast, Russia, 1910. (Photo by Sergey Prokudin-Gorsky/Galerie Bilderwelt/Getty Images)

A Bashkir switch operator by the Transsiberian Railway line near the town of Ust-Katavin Chelyabinsk Oblast, Russia, 1910. (Photo by Sergey Prokudin-Gorsky/Galerie Bilderwelt/Getty Images)

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Russia, Siberia, Baikal Lake, Trans-siberian train

Russia, Siberia, Baikal Lake, Trans-siberian train

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Attendant on the Trans Siberian Railway, Siberia, Russia

Attendant on the Trans Siberian Railway, Siberia, Russia