Atlas Air Worldwide Holdings, Inc. is the parent company of Atlas Air and Polar Air Cargo, which together operate the world's largest fleet of Boeing freighter aircraft. AAWW is principally involved in the airport-to-airport air transportation of heavy freight cargo through its two operating subsidiary airlines, Atlas Air, Inc. and Polar Air Cargo, IncAAWW, through its principal subsidiaries Atlas and Polar, offers scheduled air cargo service, cargo charters, military charters, and ACMI aircraft leasing in which customers receive a dedicated aircraft, crew, maintenance and insurance on a long-term lease basis.