I was 39 years old when the Challenger perished. I remember, the launch was postponed several times. I tried to watch it every single time (I had cable with NASA channel already).
But on the tragic day I had to perform an emergency surgery, just when the launch was scheduled.
As I came out from the operating room, I rushed to the doctor's lounge hoping for replays. The number of people in the lounge was already a surprise. It was packed with other doctors, nurses, employs, all staring the TV screen. When I came in, somebody remarked "Dr. L, the Challenger exploded".
First, it just passed through my mind as an impossibility. The person perhaps misunderstood it, something may have happened which he thought it was an explosion, I simply could not believe the statement. But within seconds the TV replayed what happened and I saw what we all saw. I still didn't believe it. Yes, it look like something bad happened, but......I couldn't find a logical alternative, but I still didn't believe it. Then I heard the voice announcement that the "Challenger exploded".
At this point my disbelief started to break up slowly. "Yes, perhaps it did", but I still found it impossible that the astronauts would have died. I was waiting for some announcement that "here and here they were picked up by such and such ship and they are fine".
I stayed there for I don't remember how long, all I remember that I was glued to the TV set and I was waiting for the "good news". It didn't come. It still took about a full day until my mind was able to accept that indeed this was a true tragedy, despite all the related announcements.