Viewers are given an all-access pass inside the dramatic world of Miami International Airport, which is considered a Category X airport (a prime target for a terrorist attack). With nearly 40 million passengers coming through it each year, the airport is the size of a small city. Whether it's intercepting drug smugglers, fighting terrorism, securing an Air Force One landing, handling medical emergencies or dealing with sting operations and aircraft malfunctions, viewers are allowed to see what travelers typically do not.