Delta Air Lines, Inc. (Delta) is an air carrier that provides scheduled air transportation for passengers and cargo throughout the United States and around the world. As of December 31, 2005, Delta, including its wholly owned subsidiary, Comair, Inc. (Comair), served 144 domestic cities in 47 states, the District of Columbia, Puerto Rico and the United States Virgin Islands, as well as 59 cities in 41 foreign countries. With its domestic and international codeshare partners, Delta's route network covers 228 domestic cities in 49 states, the District of Columbia, Puerto Rico and the United States Virgin Islands, and 197 cities in 87 foreign countries. Delta is managed as a single business unit. For the year ended December 31, 2005 passenger revenues accounted for 90% of Delta's consolidated operating revenues and cargo revenues and other sources accounted for 10% of its consolidated operating revenues. In 2005, Delta's operations in North America, the Atlantic, Latin America and the Pacific accounted for 80%, 14%, 5% and 1%, respectively, of its consolidated operating revenues. Delta has hub airports in Atlanta, Cincinnati, New York's John F. Kennedy International Airport (JFK) and Salt Lake City. Each of these hub operations includes Delta flights that gather and distribute traffic from markets in the geographic region surrounding the hub to other cities and to other Delta hubs. Delta's hub system also provides passengers with access to Delta's principal international gateways in Atlanta and JFK. Delta announced in October 2005 that Song's service will merge into Delta's in May 2006. Song was started in April 2003 as a low-fare operation primarily offering flights between cities in the northeastern United States, Los Angeles, Las Vegas and Florida leisure destinations. Delta plans to add 26 First Class seats to each of the 48 B757-200 aircraft operating in Song's service; convert an additional 50 or more Mainline aircraft to two-class service, and expand personal digital in-flight entertainment system to the converted aircraft. Delta's plan is to grow this service, referred to as Song service, to all transcontinental Mainline routes beginning in the fall of 2006 and all routes over 1,750 miles by the end of 2007. Delta has formed bilateral and multilateral marketing alliances with foreign airlines to improve its access to international markets. These arrangements can include codesharing, frequent flyer benefits, shared or reciprocal access to passenger lounges, joint promotions and other marketing agreements. Delta's international codesharing agreements enable it to market and sell seats to an expanded number of international destinations. Under international codesharing arrangements, Delta and the foreign carriers publish its respective airline designator codes on a single flight operation, thereby allowing Delta and the foreign carrier to offer joint service with one aircraft rather than operating separate services with two aircraft. Delta has international codeshare arrangements in effect with Aerolitoral, Aeromexico, Air France (and certain of Air France's affiliated carriers operating flights beyond Paris), Air Jamaica, Alitalia, Avianca, China Airlines, China Southern, CSA Czech Airlines, El Al Israel Airlines, Korean Air, Royal Air Maroc and South African Airways. Delta, Aeromexico, Air France, Alitalia, Continental, CSA Czech Airlines, KLM Royal Dutch Airlines (KLM), Korean Air and Northwest are members of the SkyTeam international airline alliance. SkyTeam links the route networks of the member airlines, providing opportunities for increased connecting traffic while offering customer service through mutual codesharing arrangements, reciprocal frequent flyer and lounge programs and coordinated cargo operations. The Delta Connection program is the Company's regional carrier service, which feeds traffic to Delta's route system through contracts with regional air carriers that operate flights serving passengers primarily in small and medium-sized cities. Delta has contractual arrangements with seven reg