Of course I also visited the nearby 6th Floor Museum which is located in the former Texas School Book Depository building. The museum was a bit pricey and didn't allow photography, but it was sort of obligatory that I go. It was interesting to see all of those famous locations up close. The distances involved were much shorter than they had seemed in all those documentaries, well within the range of a basic marksman.
On my last day in Dallas I took the TRE out to the Airport station and was able to take pictures out through the railfan view. The line is being upgraded with new stretched of double track, especially at some stations and where they augmented some old single track bridges. The Budds run all day. In the mid-day they run the short turn trains to the airport. These run every other hour with Bomber sets going to Ft Worth in the gaps. There are additional RDC sets running all the way to Ft Worth during the peak periods.
You can find all the pictures of the downtown Dallas area as well as some railroad pix I took in Garland at:
Here is a TRE Bomber set pulling into Union Station with cab car #1002 in the lead.
You can see the relationship between DART and TRE with the across the platform transfer.