I was born in 1962 and grew up in the Chicago suburbs. About the time I was 5 or 6, I remember it being not commonplace but not all that unusual to hear a boom in the sky, and my 5 or 6 (or whatever) year old friends would look startled for a second then say to each other, “sonic boom” and go about the business of playing cops and robbers or whatever.
Anybody remember those days? Did I dream this memory? I’ve tried to look up the history of transonic flights over the continental US, and I’m not sure when there was or wasn’t sonic booms I could have heard.