The earliest people in the Americas probably were Asians who crossed the prehistoric land bridge across the Bering Strait. They were largely of Mongoloid ancestry.
In prehistoric times, a land bridge joined Alaska to Asia where the Bering Strait now lies.
By the 1960s the lonesome whistle of the steam railroads was a thing of the past. The decline of railroads came about during the 1960s and 1970s as the automobile dominated transportation.