Korean Air's international passenger division and related subsidiary cargo division together serve 130 cities in 45 countries, while its domestic division serves 20 destinations. It is among the top 20 airlines in the world in terms of passengers carried and is also the top-ranked international cargo airline. Incheon International Airport serves as Korean Air's international hub. Korean Air also maintains a satellite headquarters campus at Incheon. Korean Air was originally founded as the Korean National Airlines in 1946. After several years of service and expansion, the airline was fully privatized in 1969 and commenced operations on the 1st of March 1969. The airline celebrated its 45th anniversary in 2014. The majority of Korean Air's pilots, ground staff, and flight attendants are based in Seoul.