It's hard to believe that nearly 20 years have passed since the Sept. 11, 2001 terror attacks shook the world. In the aftermath, Americans talked up unity and coming together in a time of tragedy. I was in the United Kingdom when the towers came down and when the Pentagon was hit. I still remember a banner in front of a church stating "Pray for America," and the outpouring of sympathy I received from strangers on the street when they heard my accent. (Yes! We have an accent to other ears!) I am interested in hearing people's thoughts as we approach this sad anniversary: Is there still a sense of national unity; how strong or weak do you think it is, and why?