Comedian Andrew Maxwell drives five young Brits from New York to Washington, DC, stopping at Ground Zero, the Pentagon, and the crash site at Shanksville to test what they actually believe about September 11. Each traveler carries a specific theory into the trip, from controlled demolition to a missile hitting the Pentagon, and Maxwell puts them in front of engineers, pilots, first responders, and eyewitnesses who were there that day. The film starts even-handed, letting the conspiracy claims and the official 9/11 Commission findings sit side by side, but Maxwell's own position hardens as the journey goes on and he pushes back harder on the physical evidence the theories rest on. The value here is procedural rather than ideological: watching how a specific claim, like the collapse speed of the Twin Towers, gets checked against people who worked the wreckage or studied the engineering. By Washington some of the five have changed their minds; others haven't, and the film lets that split stand rather than forcing a tidy conclusion.