I found this photograph at my link page Fallen Flags.Org, located to the right of your computer screen at www.rr-fallenflags.org. (This is a great railfan's photo site definately worth viewing.)
Growing up in Chicago during the 1960's, 70's and 80's, I have always been a huge and lifelong railfan, of the former Atchinson, Topeka & Santa Fe Railroad. The Santa Fe was an interesting and very colorful railroad with plenty of variety of equipment, and a few unique color schemes.
Railfan photographer Bill Phillips took this photograph of a Santa Fe freight train, featuring a borrowed Chicago & NorthWestern Railroad EMD GP 30, at Fort Worth Texas in June of 1977.
The lead locomotive, is wearing Santa Fe's "Yellow Bonnet" color scheme, which was introduced by the A,T & S,F in 1972, and was in use until the merger with the Burlington Northern that created todays BNSF Railway in 1995.