![Northrop XS-1](http://www.newspacejournal.com/wp-content/uploads/2014/08/northrop-xs1-150x112.jpg)
An illustration of Northrop Grumman’s XS-1 concept. (credit: Northrop Grumman)
More than a month after DARPA formally announced the winners of Phase 1 contracts for its Experimental Spaceplane 1 (XS-1) program, the last of the three companies that received those contracts unveiled the design of the concept.
In a press release Tuesday, Northrop Grumman […]
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