On the west coast of Ireland, on the banks of an estuary dividing county Limerick from county Clare, lies a small town called Shannon. But Shannon is not a quaint fishing village or farming community. Its industry is its airport. And Shannon Airport is big. It handles up to 1.7 million passengers and 20,000 flights a year, most of them from other countries. It looks like a cosmopolitan international airport, but it has a unique claim to fame: the world's first airport duty-free store.Today, the store has what you would expect -- designer perfumes, jewelry and various fine foods, with a lot of local (in this case Irish) products in particular. But like the area around the airport, the shop started out small, with a local boy from the area who would go on to change the world of tax-free commerce in and beyond Shannon.Call of Duty: Free