The American report (disputed by the Italians) on the attack on Giuliana Sgrena's car in which Nicola Calipari died was published as a PDF with certain parts blacked out which it was trivial to recover using pdftotext or similar tools. This is amazing: the world's only superpower has information that it want to conceal, but it doesn't have a clue...

See:
http://it.slashdot.org/article.pl?sid=05/05/01/1314216&tid=172&tid=103

As to whether the report helps us to understand what happened: unlikely, but analysis is needed.