World Airways, a subsidiary of Global Aviation Holdings Inc., has entered into an agreement to add two leased Boeing 747-400 freighters to its fleet. The aircraft, scheduled for delivery in December 2010 and February 2011, will grow World’s B747-400 freighter fleet to four aircraft. World is also in the process of reactivating a MD-11 freighter that it had placed into storage in 2009. This aircraft will enter revenue service in September 2010, and will return World’s fuel efficient MD-11 freighter fleet to nine active aircraft, the group said in a statement.