i was in 8th grade at the time, in ysv (for all those mentioning yeshivas) and my rebbe came in and said there had been a gr8 tragedy and a plane hit the twin towers. of course we didnt believe him and then the princibal came in said another plane hit, and a few min later said one building fell and then another,
we didnt fully understand the severity of it all, until i got home and i was too glued to the tv all night and i rememeber seeing guliani speaking to the press.
though @sky it hit me much later on, but it really hit me at my brothers wedding when my sister in law walked down with her mother....and her brother, bec her father was killed in the attack,