Boeing, NASA, and U.S. Army personnel work around the Boeing CST-100 Starliner spacecraft after it landed on Dec. 22, 2019. Photo: NASA/Bill Ingalls

Boeing has agreed to repeat the test flight of its Starliner space capsule, a decision that sets its crewed space ambitions back by months and makes it likely SpaceX will win the race to return NASA’s astronauts to space from United States soil.

The announcement comes after the initial flight late last year was marred by software glitches that prevented the capsule from reaching the International Space Station.