Papaw, I googled it amd found it was at the Ellington field, I wondered if you had make the trek out to Intercontinental at sunrise!
I have a picture from the early 80's when I lived in League City (south of Houston) of the shuttle flying back from out west, it made a wide turn to line up for Ellington and we got some nice shots of them. It is quite a site to see them flying piggyback!.
Brian L.