Frederick W. Smith International Airport (IATA: MEM, ICAO: KMEM, FAA LID: MEM) is a civil-military airport located 7 mi (11 km) southeast of downtown Memphis in Shelby County, Tennessee, United States. It is the primary international airport serving Memphis. It covers 3,900 acres (1,600 ha) and has four runways. It is home to the FedEx Express global hub, often referred to as the FedEx Superhub or simply the Superhub, which processes many of the company's packages. Nonstop FedEx destinations from Memphis include cities across the continental United States, Canada, Europe, the Middle East, Asia, and South America. From 1993 to 2009, Memphis International was the world's busiest airport for cargo operations. It dropped to second place in 2010, just behind Hong Kong.