A unit of German airline Lufthansa, Lufthansa Cargo is one of the world's leading air cargo carriers. The company maintains a fleet of some 20 freighters; in addition, it manages the cargo capacity of its parent's passenger aircraft and those of other airlines. It operates from a hub in Frankfurt and from major bases in Leipzig and Munich, Germany. Overall, Lufthansa Cargo serves about 300 destinations worldwide, many via its partners in the WOW alliance, which includes the cargo units of Japan Airlines, SAS, and Singapore Airlines, and some through arrangements with trucking companies.