Boeing's sub-scale X-48B Blended Wing Body aircraft flies over the edge of Rogers Dry Lake at Edwards Air Force Base during its fifth flight on Aug. 14, 2007

A pristine blue sky backdrops the X-48B Blended Wing Body aircraft during the aircraft's first flight July 20, 2007, from NASA's Dryden Flight Research Center

Jul 20, 2007

This closeup of Boeing Phantom Works' unique X-48B Blended Wing Body technology demonstrator shows off its unusual engine placement and supercritical airfoil

Oct 24, 2006

Boeing's X-48B Blended Wing Body technology demonstrator shows off its unique lines at sunset on Rogers Dry Lake adjacent to NASA DFRC

Oct 24, 2006

Boeing's X-48B Blended Wing Body technology demonstrator shows off its unique lines at sunset on Rogers Dry Lake adjacent to NASA DFRC

Oct 24, 2006