SpaceX's Crew Dragon Faced a Bumpy Road to Launch

Since the end of the space shuttle program in 2011, the U.S. has used Russian Soyuz spacecraft every time it wants to, well, shuttle humans to and from space. While NASA is busy working on its own solution, the agency has increasingly turned to private companies, such as Elon Musk’s SpaceX, to cover its off-planet transportation needs.