But they can convey truths, some truths," said Mr. Greengrass, who directed the shatteringly realistic 9/11 drama "United 93" (2006). "I think you can, if you're lucky, capture some of the layers of it. The lack of easy answers."
"When you can balance regard for the facts and a desire to be truthful about the experience, you get the truths of cinema," said Mr. Greengrass. "They are different from journalism, but they are profound nonetheless."