I have posted a lot about this day at The Way of Improvement Leads Home. Here are some of those pieces:
Why September 11 is About Vocation
September 11th, Patriotism, and the Human Spirit (at Patheos)
The Mike and the Mad Dog 9-11 Tapes
Teaching St. Augustine on 9-11-01
Teaching 9-11 With Help from Springsteen
Rise-Up: Springsteen in Pittsburgh