I Saw This Cool Locomotive

I was making my way. Then I passed though and I saw this cool locomotive.
I didn't have my camera on me. so I used my photo. I have to say I am impressed with how the photo came out since I had to zoom in to get the train. On my old phone I tried to photograph
a Union Pacific train waiting for clearance and the photo looked like shit.
I think this loco belonged to an older railroad
it has "rock Island" on the side. so I assume its from the Rock Island Railroad
its a heritage unit.
its cool to see one of these.
they can be rare to spot