The nightmares/panic attacks and every other PTSD syndrome are a very real consequence remaining from that day. Tell the children who wake up crying for their dad every night and the mother who stays awake with them crying that they are crying over 'spilled milk' Absolutely absurd.
There is still a large majority of the population that just does not grasp the psychological impact that an event of that magnitude has on the general populace. I was absolutely shocked/apalled and felt like I was there that day even though I was sitting 600 miles away in study hall with no relatives or anyone I knew in lower Manhattan. I guess some of us just have more compassion and morality than others.