Space X's spaceship launched from Cape Canaveral in Florida on Saturday.NASASpaceX launched a half-empty Crew Dragon for two Boeing astronauts awaiting a trip home.NASA made a hard call after Boeing's spaceship glitched. The astronauts won't return until 2025.SpaceX's spaceship has outpaced Boeing's, delivering astronauts faster for nearly half the cost.SpaceX just launched a half-empty Crew Dragon spaceship into orbit for two astronauts who have been waiting for a trip home.Normally, Crew Dragon carries four astronauts to space at a time, but for the launch on Saturday, only two were aboard.The unusual mission is the result of one of the toughest safety decisions NASA has had to make in decades.