On today’s show, the Planet Money T-shirts arrive at the Port of Miami. But they’re not quite here yet. If you’ve ever waited at an airport to clear customs, you can understand where our shirts are now: waiting for permission to enter the country. Standing between our shirts and the rest of America is a 3,000 page book. The book is a powerful force that creates and destroys entire industries around the world. Squadrons of government agents use tools of violence and destruction to ensure that the rules laid out in the book are followed. Also, the book tells us how much we’ll have to pay in taxes to import our T-shirt into the U.S.