East bound Amtrak 4 passes the endangered cantilever signals at West Baring, Mo. on the BNSF Marceline Sub.
Two Santa Fe F45s and an F7B lead Amtrak 4, the eastbound Southwest Chief, as it pauses at the Flagstaff AZ station on a chilly March 6, 1973, morning.
Amtrak 4 backs into CUS with a variety of paint schemes.
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