Sky watchers: chemtrails and San Antonio

I don't have the opportunity often to watch the grids being lain at 20,000 feet over our city, but I've observed and read just enough to make me curious when I catch a glimpse of a lingering aerial plume. So when a fellow on the Northside (north of San Antonio International, to be more precise) called me up and offered photos of spraying he observed yesterday (which preceded our afternoon haze and subsequent solar halo), I offered to post a few of them here and just sort of put it out there to see what y'all thought. Are there any sky watchers in San Antonio? What of this chemtrail notion, Texas?