In this image taken from video, NASA engineers test fire a key part of a rocket engine left over from the 1960s-era Apollo moon missions on Thursday, Jan. 24, 2013, in Huntsville, Ala. Engineers hope to gain valuable knowledge from the engine, which was originally supposed to power the Apollo 11 moon mission in 1969 but was grounded by a problem. (AP Photo/Jay Reeves)
NASA rocket scientists in Alabama are testing an old engine that was designed for the 1969 moon mission. They’re trying to see what the old technology can teach them, as they prepare for a return to the moon.