Photos: Tuesday’s Atlas 5 rollout

An unpiloted test flight of Boeing’s Starliner crew capsule to the International Space Station will be delayed from its previous target launch date of April 2 until at least May, after the arrivals of Russian Soyuz and SpaceX Crew Dragon ships bringing fresh crew members to the orbiting complex, NASA officials said Monday.

Sunday’s flight of the United Launch Alliance Atlas 5 rocket from Vandenberg Air Force Base in California was scrubbed due to a wildfire burning south of the pad. The launch delay allows crews to remain in place to battle the blaze. The lack of Range availability this week means the next launch try won’t come until Sept. 26.

NASA and Boeing have awarded Aerojet Rocketdyne widely-anticipated contracts to restart the production of simplified shuttle-era rocket engines for the heavy-lift Space Launch System and supply the propulsion system for the CST-100 Starliner commercial crew capsule, officials announced this week.