I realized I had a couple of nice photos hanging around, from National Train Day 2012. I got to the Fort Worth Intermodal Transportation Center only after things were already winding down, but there was an interesting pair of locomotives sitting on a track normally used for AMTRAK services.
I've seen at least one other UP "heritage" unit, in Missouri Pacific livery, but I was driving at the time & didn't get a photo. All manner of rolling stock comes through the Fort Worth yards. This one reminds me more of the steam version of the Daylight colours, probably because of the black, & the stripes on the cab ends, than any actual SP diesel livery.
For those who are interested, the builder's plates. The BNSF was fresh out of the box.