Some guy from here in the UK has made this debunking of CIT. It's a very good analysis of their methods and distortions. He does an amazing job at analysing Roosevelt Roberts' testimony in part 2, and even uses a flight simulator in Part 4 to prove that a north side impact may be possible.
Related Info:
National Geographic, Muse, Internet Censorship, Sibel Edmonds, Invisible Empire, 911-DIS.INFO and the Union of Truthers and Debunkers
Not All Debunking Is Created Equal
Dawn Vignola’s Account vs. CIT’s Methods by Erik Larson
Scootle's CIT Deception Mock Trailer
Refuting the Hollow Arguments of the So-called 9/11 Debunkers & Truthers