I still get chills thinking about it. I don't think that will ever go away for me. I'm from NY originally and my parents live about an hour north of the city. My hometown is FULL of people commute into NYC everyday for work.
I had just started college at Penn State. I didn't have an early class that day, but I had woken up early. I was still lounging in bed when my roommate came back from her 8am class and turned on the tv. We watched the second plane hit and were locked to the tv in horror for pretty much the rest of the day. My dad was commuting into the city on random days during the week and I was absolutely panicked. I knew that he walked past the towers from his train/subway stop to get to his office. I spent a long time frantically calling home, but since NYC was in such a state of panic EVERYONE was on their cell phones and I couldn't get through (I had a NY cell number at the time, so it affected me even out in the middle of PA). I finally thought to send an email out, and by some stroke of my fate my dad had decided to work from home that day instead of going in. Several regulars on his train were injured or killed as the towers collapsed pretty much right as they were walking to their offices. I very easily could have lost my Dad that day, and that fear will never leave me I don't think. I remember going to several candle light vigils in the next few days. I remember the panic whenever a plane flew overheard (there's a nuclear reactor on the campus, and at that point there was no way of knowing where the next attack would occur, and a nuclear reactor was as good a guess as any). For a week or two I was constantly asked if I knew anyone who had passed, since most people knew I was from NY. It was very surreal.
Even 8 years later, the skyline just doesn't look right.
There's a certain road in NJ that we used to drive down, and at one spot on the road you crest a hill and you used to be able to see the towers. It still unnerves me to not see them when I'm on that road.