NASA might let SpaceX fuel rockets with astronauts on board

After nearly two years of debate, NASA has finally approved SpaceX's plans to load propellant onto its rockets with people on board -- a move that has been considered risky by some aerospace experts. However, the approval is contingent upon one thing: SpaceX must successfully demonstrate this fueling method at least five times on its new upgraded Falcon 9 rocket, the Block 5, before the process is certified for human spaceflight. NASA announced this decision late Friday on its website, saying th...