“So many poignant words have been written, so many tears shed in the past week. I can’t get my head around it all. I read that each of the floors of the WTC was nearly an acre in size… At this stage it sounds like the number of dead will likely be around 6,000. That just sounds too big to be right. I wondered what that many people would look like in a group photo, probably something like the start of a huge marathon run. So to satisfy my need to grasp this, I found an image of a group of 20 people — then multiplied it up to create a group of six thousand. This is what six thousand people looks like. As I was making the image, I kept thinking, ‘this must be wrong, it looks like too many,’ but it isn’t wrong.”