I had only been in and out of Houston since leaving our Sunnyside neighborhood on the city’s southeast side, in 1968, to begin eight years of Air Force service. Whenever I returned, I made only casual note of neighborhood and city changes, such as the sad state of the mom-and-pop “candy store” where we used to hang out after school, now boarded up, or a new skyscraper for a Houston skyline dotted with cranes, or another congested freeway opened to …