A war film can be propaganda and they're very valuable as propaganda, as we realized in Britain in the Second World War. Film as propaganda is a very valuable tool. It can also demonize, which is the dangerous side of a war film as propaganda. But there are war films that are not propaganda. It's just saying 'This is what it's like.' For 99 percent of us we don't know what it's like. We have no idea. So to reveal that to the audience is powerful.