Nuc Power School in Orlando (class 8602). Tried to watch the launch at about 7 then it got delayed. Left the building later in the morning and saw the smoke trails in the sky.
NAS Cecil Field in Jacksonville, teaching F/A-18A avionics at NAMTGD 1039. One of the other instructors poked his head into the doorway of my classroom, said "The shuttle just blew up", and ducked back out. After a few stunned seconds we followed the crowd streaming to the parking lot. There in the cold blue sky was the now infamous forked SRB plumes. Hard to believe that 19 years have gone by since that day.
BTW, Chief, on my last Orlando visit I drove by the old NTC site. The base had been completely leveled for redevelopment, and cookie cutter housing stood where the Nuc School used to be. Kinda sad. I taught BE/E at NTC Orlando as a contract instructor, my first civilian job after getting discharged in 1989. The bases, ships, and squadrons that were a part of my Cold War Navy service are rapidly disappearing.