ORLANDO, Fla., May 1 (UPI) -- The duration of SpaceX's first mission with astronauts on board -- planned to launch at May 27 from Florida -- has been extended from a few days to potentially weeks aboard the International Space Station, NASA said Friday. The mission was lengthened to ensure that the crew -- astronauts Bob Behnken and Doug Hurley -- can help maintain and operate the space station, NASA Administrator Jim Bridenstine said in a statement. "Among the work that will await their arrival is upgrading the space station's power system with new batteries due to arrive in May,"...