What was edited out of ABC's "Pathway to 9/11" can be found here. The website has the original video of the sections edited out of the final version. It also posts a useful synopsis of each section edited out.
Updated 9/23/06 - A friend e-mailed me the following:
I checked out the clips that were supposedly the 20 minutes that ABC edited out of the first installment (Sunday nite). Recollection is that I remember all but one of said clips as being in the actual showing on the network. Whether the TVC people got their excerpts straight or what, I don't pretend to know...
I don't know the answer to this. If anyone has analyzed what ABC left in or took out, I'd be glad to know.