why NASA astronauts must return via SpaceX instead of boing starer NASA astronauts recently traveled to the ISS using Boeing Starliner capsule but a return issue arose concerns were identified with Stalin's propulsion system prompting a decision to switch to SpaceX the propulsion system's problems could compromise safety making a different vehicle necessary for return this change underscores the challenges Boeing faces and its impact on future space missions spacex's reliable crew Dragon will ensure the astronaut safe return maintaining Mission Integrity stay updated on space exploration by subscribing to our Channel