See my post 55.
I reviewed some DVD's when I was deciding what to send the troops for 9/11.
And we just watched "The Flight that FOUGHT Back" on the Discovery Channel about Flight 93 on 9/11.
I also recommend it. It can be purchased on the Discovery Channel website.
http://shopping.discovery.com/stores/servlet/ProductDisplay?storeId=10000&catalogId=10000&langId=-1&productId=58878&partnumber=731885&jzid=40588001-37-0&ref=http://dsc.discovery.com/convergence/flight/flight.html