A United Launch Alliance engineer Dillon Rice said the issue involved an oxygen relief valve on the upper stage of the company’s Atlas rocket. NASA hired Boeing and SpaceX a decade ago to ferry astronauts to and from the space station after the shuttle program ended paying the private companies billions of dollars. Starliner’s debut test flight without a crew in 2019 ended up in the wrong orbit and failed to reach the space station forcing Boeing to repeat the demo before astronauts could fly. Source: https://www.artikelschreiber.com/en/.