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| Last updated on January 25, 2024
Watch this video featuring Union Pacific 4-6-6-4 Challenger locomotives
Union Pacific Challengers in service were one of the great sights of American railroading in the 1940s and 1950s, when they were near the pinnacle of super-powered steam.
Please enjoy this digitized 8mm video originally take by Dick Wallin in 1959 east of Cheyenne, Wyo. Only from Classic Trains!
