I live in DC and was at the Natural History museum with my kids this morning right before this happened. I was shocked and saddened to hear about this. Yes, I certainly know that my city is not crime free, but really, to shoot a poor security guard is senseless. It really is a shame that this had to happen. They brought both the victim and gunman to GW Hospital, where my husband works, and when I found out that the poor guard had died, while this gunman lives on, I was incensed. That poor man, trying to work and earn a living and he gets gunned down.