With the sun near the horizon, UP shows that a new boss has come to Roseville, CA. Gone are the hoards of tunnel motors, SD45s and even SD9Es of SP, replaced by the big, modern EMDs and GEs of the new owner. For those of us who grew up with the SP, it's a sad day.
The EMD SD (special duty) series are a strong and reliable kind of locomotive which still serve America's rails today. They have proved themselves reliable by clocking in several million miles of freight service over several decades.