"The U.S. military's new XS-1 space plane will be built by Boeing, and it's called
the Phantom Express.

The Defense Advanced Research Projects Agency (DARPA) announced today (May 24) it
had selected Boeing for the next phase of its XS-1 project, known as the
Experimental Spaceplane, after an intense competition among aerospace companies.
The XS-1 is aimed to be a completely reusable military space plane capable of
launching 3,000-lb. (1,360 kilograms) satellites into orbit 10 times in 10 days.
The spacecraft could dramatically reduce the cost of launches to $5 million per
flight, DARPA officials said."

See:

http://www.space.com/36985-darpa-xs-...m-express.html