The Bourne series director Paul Greengrass' intense United 93 pieces together the incredible moments of that fateful day when terrorists took over Flight 93 and ordinary, everyday passengers risked their lives to rise up against them. Because we all know what fate befalls the heroic passengers of that plane, the film's slow-burn build-up lights the fuse to an inevitable conclusion that delivers a truly intense and emotional punch. This one's arguably the best of the 9/11 films.