The plane will be built in California at the Mojave Air and Space Port in a new Stratolaunch hangar currently under construction.

BBC: The futurist: The world��s largest plane

It appears likely that an even greater percentage could be of use in Japanese efforts to develop a space shuttle, and perhaps even their counterpart to the U.S. National Aerospace Plane.

CENTERFORSECURITYPOLICY: The FS-X Agreement

If you typically reserve a seat in the back of the plane to get earlier boarding and more availability of overhead bin space, you might now want to reserve a window seat on United.

WSJ: Summer Air-Travel Survival Guide