The fruitless search for Weapons of Mass Destruction immediately following the 2003 Iraq invasion leaves one dogged US Army officer questioning his own side in this blend of military action and conspiracy thriller. This reteaming of director Paul Greengrass and star Matt Damon promises - and certainly delivers - plenty of high-octane Bourne-style entertainment as Damon's character barrels through a series of life-threatening chases and scrapes. There's a startling sense of immediacy as we're pitched into the chaos following the fall of Saddam, with Greengrass's trademark bullet-dodging handheld camera capturing the breathless mayhem. Brendan Gleeson (as a pragmatic CIA station chief), Greg Kinnear (as a Washington intelligence expert fighting the propaganda war) and Khalid Abdalla (representing the aggrieved and excluded ordinary Iraqis) all contribute powerful performances that illustrate different sides of the argument - even if the film ultimately condemns the short-sightedness of the Bush-led campaign. Exciting, believable and thought-provoking, this is what popular cinema is all about.