One thing I remember thinking, standing there by those square gaps in the ground where towers once rose, is that the buildings weren't quite so wide as I thought. They were immense and tall, but more slender than we often think. I remember wondering if there was really enough space on so small a bank of granite to engrave all those names. But of course, there must be.
Our country was deeply wounded that day, and I'm not sure how well we're healing. Sometimes I wonder if we're healing at all. But making something beautiful out of a scar is a good place to start.