Delta Air Lines, Inc. engages in the provision of scheduled air transportation for passengers and cargo. The company is headquartered in Atlanta, Georgia and currently employs 103,000 full-time employees. The company went IPO on 2007-04-26. The firm has hubs and markets in Amsterdam, Atlanta, Bogota, Boston, Detroit, Lima, London-Heathrow, Los Angeles, Mexico City, Minneapolis-St. Paul, New York-JFK and LaGuardia, Paris-Charles de Gaulle, Salt Lake City, Santiago (Chile), Sao Paulo, Seattle, Seoul-Incheon and Tokyo. Its segments include Airline and Refinery. Its airline segment is managed as a single business unit that provides scheduled air transportation for passengers and cargo throughout the United States and around the world and includes its loyalty program, as well as other ancillary businesses. Its refinery segment operates for the benefit of the airline segment by providing jet fuel to the airline segment from its own production and through jet fuel obtained through agreements with third parties. The refinery's production consists of jet fuel, as well as non-jet fuel products.