Would those same teenagers also not know that the ISS exists or that humans went to the moon 50 years ago?
If, as your tone implies, you believe that every teenager knows everything and it's not possible for some of them to have not heard or these things, then you must in fact be a teenager yourself.
Challenger was mentioned, but only because I brought in a newspaper clipping for the 20th anniversary.
Prepare to be disillusioned about humanity.