NASA has purchased two seats on Russian Soyuz capsules launching later this year and in early 2018 to expand the crew on the U.S. segment of the International Space Station from three to four, and reserved options to fly astronauts on Soyuz spacecraft in 2019 if commercial rides are not available in time.

Three days after launching from Cape Canaveral, SpaceX’s Dragon cargo craft has arrived at the International Space Station with around 5,600 pounds of supplies and experiments. The automated, unpiloted supply ship was snared by the station’s robotic arm at 7:21 a.m. EST (1221 GMT) Saturday.

NASA’s first space-worthy Orion capsule blasted off atop a Delta 4-Heavy booster rocket for a two-orbit, four-hour shakedown cruise in orbit. Liftoff occurred at 7:05 a.m. EST (1205 GMT), with splashdown in the Pacific Ocean at 11:29 a.m. EST (1629 GMT).