The Space Shuttle was originally intended to make getting to space easy, inexpensive, and routine, with an initial goal of a launch nearly every week. It didn't quite play out that way, and we’re now back to tossing things into orbit on top of massively expensive rockets that are good for only a single one-way trip. It’s a system that works (most of the time), but it's not a system that’s efficient.Just because the Space Shuttle didn’t magically open orbit up to everyone doesn’t mean that getting to space through a reusable platform is a bad idea. In commercial spaceflight circles, the thinking is that reusability is the best way to help drive down costs. DARPA, the U.S. Defense Department’s blue-sky research arm, wants a piece of the action; but in typical DARPA fashion, the agency is looking for something even more futuristic. It has just awarded nearly $20 million to three aerospace companies to continue design work on a reusable spaceplane that will be able to launch a satellite into space every single day.