I was in New York last Fall and visited the 9/11 Memorial, still under construction at the time. Needless to say, it was an emotional visit. Like most people in the world, I was terribly shocked and saddened by those senseless attacks. We were living in Washington, D.C. at the time, but on vacation in Brazil that day. Watching the images of the Twin Towers and the chaos in New York, as well as the Pentagon, I felt a terrible sense of loss, anguish, and, for some strange reason, guilt for not being there for my friends and colleagues in D.C.