Years -- decades -- ago, when I was a lad, folks like my mom, grandma and people their age would sometimes talk about where they were when past events occurred. The JFK assassination is the one I heard about most. The adults would get a misty, far-away look in their eyes, summoning their memories of that terrible day. These particular scenarios come flooding back today because it is the 30th anniversary of the space shuttle Challenger disaster, and now I am one of the older people getting that misty, far-away look in their eyes. January 28th, 1986 was a Tuesday. A quick Internet search helps lock that down. Most everything else I remember without assistance. I was in fourth grade, Mrs. Keller's class. Except Mrs. Keller wasn't there that day. We had a substitute. I can't remember her name, and that's a shame as she came across as quite a nice person. Young(ish), I remember her interrupting the normal lesson plan with a pained expression creeping across her face....