In this week’s Flightless Bird, David Farrier sets out to understand the American airport and what makes it tick. Why are the top seven busiest airports in the world all based in America, and what does that mean for the traveler? David sets off for the world’s third business airport, Denver, to dig into the various conspiracy theories surrounding the airport. Why does it greet passengers with a giant terrifying mustang with glowing red eyes and did it really kill the artist who made it? David descends into the huge underground network of tunnels under the airport to find out what’s really going on there and tries to find answers to the strange, apocalyptic artwork on display at the terminals.