Bloody Sunday (Paul Greengrass, 2002)
Watched this for some background on Greengrass' style before seeing United 93. It's also a documentary-style recreation of real events, shunning things like exposition and character development in favor of immediacy and immersion. Unlike 9/11, the events in this movie (a civil rights demonstration in 1972 in which 13 Irish protesters were killed by British soldiers) aren't already familiar to me, so I was at times a little lost about what was going on. But overall the film does a very good job of giving you a sense of what it would have been like to be there at the time, and mostly avoids sensationalism. I found it interesting that it had a clearly political view sympathetic to the protesters, in a situation where the British government still denies that the army did anything wrong. It presents the protesters' version of events as the truth, which is given weight thanks to the documentary style. I have no doubt that Greengrass believes that's what really happened, but it's an interesting contrast to me to the mostly agreed-upon facts of what happened on 9/11.