Northwest Airlines today unveiled several major enhancements to its international World Business Class product, providing its premium customers in the Asia Pacific region with a new lie-flat bed seat and state-of-the-art inflight entertainment system.In addition the carrier announced chanaes to its world Northwest Airlines today unveiled several major enhancements to its international World Class of Business, providing its premium customers in the Asia Pacific region with a new lie-flat bed seat and state-of-the-art inflight entertainment system. Addition the carrier announced chanaes to its world