Ahhh yes......"The Vet". One who had attended that concrete circular hell will never forget it. You either froze your balls off, or nearly died of heat stroke. It was usually the latter. I remember sitting up top, like at the VERY top around 1983-84. In July or so. It was PURE HELL. You couldn't hear a damn thing at that elevation except echo, and you got the full blast of the sun for not just hours, but DAYS on end because DC's were like 4-6 days or something.
Circuit Assembly? I remember being very young, and going down to a race and/or polo track. That was kind of neat. But mostly, it was the old Grantville Assembly Hall. Back when they actually served FOOD!! Back when the carpet and seats were ORANGE! When they had a woman actually play a grand piano up at the bottom of the stage. It had food service and a dining room! It also had the coolest baptismal pool I've ever seen in my life. My parents got dunked there around 1982 or so. I was witnessed it at age 3, and still remember it. The pool was great because the walls surrounding it were this nature seen, with frogs, birds, etc. I don't mean painted, I mean 3D painted, etc. There were also little waterfalls trickling down the sides, of real water! The railing was a cast iron, that I can still smell/taste even 30+ years later.
But seriously, CA's and DC's were the some of the most boring times of my life. School was 1000 x more preferable to me, as it kept my attention and I could take a leak without getting the "frown" from my parents.