Did they move all the ADA training to Ft Sill from Ft Bliss? I was an intern at White Sands Missile Range WAY back in the day. Ft Bliss, WSMR, and Holloman AFB made one hell of a combo (and still do I'm guessing). Add to that the Navy detachments at WSMR and you had a real multi service national asset.
And and I don't doubt you are very proud of your son for serving his country, as you well should be!