[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2011/images/08/30/costello_vert.jpg width=200 height=230 align="right"] From CNN's Carol Costello: Even now, a decade later, it's hard to put into words exactly what September 11th means to us. That day, both the pain and the glory of humanity were on display, unfiltered, and in real time. Talk Back: How has 9/11 changed you? Let us know. … Continue reading Talk Back: How has 9/11 changed you?