The flag rising at the WTC gets me every time too. I was only like 20 or 21 at the time so it brings back a lot of memories and feelings. As for the challenger I was only in 1st or 2nd grade and we were not allowed to watch it or that is what I remember. I was really too young to really understand all of what had happened so I do not have a connection to it like I do with 9/11. I do love this new version and can't wait to be able to see it in person.
I might be a year or two older and both events affected me greatly. I was/am a space geek who wanted to be an astronaut. For 9/11, I was at my first real job (in NJ) for a year or so and could see the NYC skyline from the top of the parking deck. I saw the second tower fall and was with people who had family and friends who worked in the financial district.