Last year's retirement of the NASA's Space Shuttle program doesn't mean the end of Congressional budget woes for the U.S. Space Program. The winged spacecraft are being sent to museums, including the Smithsonian in Washington, D.C. In their place, NASA hopes to create a brand new four hundred foot tall rocket called the Space Launch System, or SLS, to carry astronauts on missions far from Earth, perhaps to an asteroid, or maybe to the planet Mars.