I was going to write about all the details of my day four years ago. But it really doesn't matter.
Planes flew into buildings. Two of the buildings came down. One plane was downed by its passengers so it wouldn't reach the intended target. Many people died.
It was a horrible day. And four years later, I still can't quite believe it happened. But it did. And I grieve for those who will grieve for the rest of their lives.