Here's a short clip from the Associated Press talking about the new Ground Zero memorials and the effect that the attacks had on NYC, and some of those who were involved.
Obviously the numbers mentioning the population in the one square mile around Ground Zero are awesome, and it proves that the resolve and will New Yorkers was not only un-hurt after 9/11, but it was strenghtened in many cases.
Now there is one example where it is apparent how profound the fear was and is that was created from that day. After 9/11 many of those who were present during the attacks and survived needed to leave New York City to mentally cope and move on. However in Janice Collins' case I totally disagree with her fear of her kids being victims of a subway terrorist attack. The chances of them being killed by cancer, or killed in a traffic accident driving in their suburban community is far higher.
Living your life in fear of even stepping outside your door is a terrible way to go about after an event like that. What's worse is "cities are dangerous places" message she seems to be passing on to her kids. Sheltering your family in hopes of keeping them safe, I don't know how I feel about that.
My own opinions aside, it just goes to show how traumatic those events were on those involved, and the extremes people will go to in order to mentally cope.