Video: Falcon 9 rocket lifts off from pad 39A (members only)

NASA has completed an exhaustive review of software problems and procedural oversights that prevented an unpiloted Boeing Starliner capsule from docking with the space station last year. The agency is implementing 80 recommendations to clear the way for a second test flight later this year and, if all goes well, Boeing’s first piloted flight next spring, officials said Tuesday.

After a one-day delay to wait for improved conditions in the offshore abort zone, SpaceX and NASA launched four astronauts at 5:49 a.m. EDT (0949 GMT) Friday aboard a Falcon 9 rocket and Crew Dragon spaceship from Kennedy Space Center in Florida. The astronauts docked with the International Space Station at 5:08 a.m. EDT (0908 GMT) Saturday for a planned six-month mission.

China added a fourth craft Tuesday to a network of geostationary data relay satellites tasked with keeping mission control in steady contact with Shenzhou crew capsules and a planned space station.