WOW! Type in the locos name on Google and see what links come up including Wikipedia. Loco history and other interesting facts. Example, try " EMD SD24"
Googling anything is a great idea, using information from Wikipedia is not. Since anyone can offer information, or even do editing, you may not always find Wikipedia to be correct. Use it only as a starting point.
Wikipedia is also okay if you know a fair amount about the subject so you can check the article for accuracy.
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