NASA Test Fires SLS Flight Engine Destined to Launch Astronauts Back to the Moon

NASA engineers have successfully test fired the first flight engine destined to power the agency's mammoth new SLS rocket that will launch American astronauts back to the Moon and deep space for the first time in nearly five decades. The flight proven RS-25 powerplant engine previously flew as one of three main engines that successfully rocketed NASA's space shuttle orbiters to space during the three decade long Space Shuttle era that ended in 2011. On March 10, NASA engineers conducted a succes...