This morning, I walked out of the building in which I live, walked across the street, and saw this. For today, I am grateful for South Carolina patriotism; I appreciate whoever is responsible for the gesture. It jolted me into a somber mood, as I realized, for the first time, that today is September 11. I was a junior in high school when the planes hit the twin towers. It was so confusing then and mostly still is. I do think this day is worth remembering, though: for the sadness of the losses American incurred, for the complexity of inhabiting this world together, and even for the oh-so-brief unity we felt after the attack.