The guy got what he deserved, actually better than he deserved. It could not have ended any differently. He was dead when they decided the mission was a go, he just didn't know it yet. We can't even decide where and how to try the guys we already have. Having Bin Laden as a prisoner would have been a nightmare on so many levels it made bringing him back alive impossible.
I remember being in my office on 9/11 and hearing something on the radio about a plane hitting one of the towers. I went to the conference room where we had a television and spent a good part of the day watching the events unfold as they happened.