You can find the full set of photos here.
I started my day hanging out in HARRIS tower, occasionally pausing to photograph various passing NS trains. At one point I caught this meet between NS C44-9W's #9484 and #9389 and NS ES44DS's #8145 and #8051.
The early afternoon is when both the eastbound and westbound Pennsylvanians. The westbound specifically can tend to hang out for a bit thanks to all the schedule padding. Here we see Train 42 with P42DC #96. Behind it P42DC #92 sits coupled to Metroliner Cab Car #9647 as protect power.
A few minutes later Amtrak P42DC #96 departed Harrisburg with Train 42 through the newly rebuilt STATE interlocking, that had just been cut over a few days prior closing the old STATE tower that had been in service for 79 years.
After Train 42 departed, a mid-day westbound Keystone train arrived with Metroliner Cab Car #9636 and ACS-86 #663.
I had re-positioned myself to the now re-opened Mulberry St bridge in order to get some photos of the Autumn Express as it turned off the Reading Valley Branch at CAPITOL tower. Although it was only a few miles away, it was delayed by congestion and while waiting I caught this light engine move heading off the wye track from the Lugan Branch led by NS C44-9W #9803.
Two of the Three units in the light engine move, #8877 and #8880 were NS C44-9's, the last "standard cab" GE's built.
The cause of the delay soon appeared in the form of a westbound merchandise train led by NS SD70ACe #1012 and C44-9W #9705.
Following behind was the 2016 Autumn Express powered by Amtrak Phase III Heritage P42DC #145, Veterans P42DC #42 and Veterans ACS-86 #642. This was followed by Metroliner conference car #6800 and about 12-14 coaches. Fun fact, the ACS-86 had more power than the two P42's combined.
After a brief stop to drop off the NS pilot, the train continued on past the former PRR Harrisburg Station.
I returned to HARRIS tower to await the return of the Autumn Express, which continued on to wye at the Rockville Bridge. Because of a track of out service, an NS freight hauled by SD60E #6939, ES44AC #8402 and C44-9W #8402.
When the Express appeared again a spike of railfans was on hand to photograph it.
Passing the tower, the Autumn Express also passed by a resting Keystone set hauled by ACS-86 #641.