The NS F-units lead an OCS inspection trip from Birmingham to Knoxville. The train had run from Mobile to Birmingham the previous day. It is seen here northbound on the AGS just north of Trussville.
Classic diesels such as EMD F-units and E-units embody the halcyon days of railroading in the United States, and they just plain look and sound awesome. Here are some personal favorites of the 'covered wagons' I've encountered.