NASA Unveils Commercial Airplane Designs of the Future

Turbulent Skies: The History of Commercial Aviation
Jan 17, 2011 — NASA has unveiled three design concepts for the future of commercial aviation that were developed by Lockheed Martin, Northrop Grumman and Boeing. Northrop's design employs twin fuselages, and Boeing's looks more like a flying wing, while Lockheed's is the most traditional looking of the three.

Source: Planet Data