Video: Liftoff of Atlas 5 with GPS 2F-10

United Launch Alliance called off a test-firing of the company’s first flight-rated Vulcan Centaur rocket at Cape Canaveral Thursday to troubleshoot a problem with the booster’s engine ignition system.

SpaceX raised a 215-foot-tall Falcon 9 rocket on pad 39A at NASA’s Kennedy Space Center in Florida this week, shortly after the launcher rolled out of the company’s hangar with a Crew Dragon spaceship to ferry four astronauts to the International Space Station.

Ground crews at the Xichang launch center in China postponed the launch of a Long March 3B rocket into orbit Tuesday that was to complete the deployment of the Beidou navigation fleet, a project approved by the Chinese government in 1994 to end reliance on the U.S. military’s GPS network.