A year ago at QotD I gave an answer to this, but now I have realised that I was remembering wrong.
I was in grandfather's room. Grandfather had died less then a month before that and the room still had all if his things. I wasn't aimlessly switching programs on TV. TV was on, but only as a background noise. I was looking through his papers and notes about how he gathered his 50 years graduation meeting - they have left the school in 1941. (That's what have kicked up my memory - I am working with those papers right now) Whatever was on was cut to a live feed from NY and I have looked up at TV about a minute before second plane hit. It took me some time before I understood it was for real and then a couple of tries to get my parents to believe and turn on their TV.