A recycled SpaceX capsule carrying four astronauts has arrived at the International Space Station (ISS). It's the third time Elon Musk's company has delivered astronauts for NASA. The Crew Dragon capsule docked autonomously with the station 420 kilometers above the Indian Ocean, a day after launching from NASA's Kennedy Space Center. Footage from NASA TV showed the capsule floating toward the ISS before slowly docking with it. The new arrivals will spend six months in orbit.