The international space station is one of those little things that give me hope in humanity. I mean jeez, Americans and Russians working together? Did that seem possible to anyone a couple decades ago? Stuff like that helps to keep me the eternal optimist I am famous for being.
To the families of the Columbia's crew, and to all of you involved in space exploration projects who face such dangers, you have my respect and admiration. You are heroes in a world in desperate need of heroes.