Until the air leak detected on the ISS' Russian segment is resolved, NASA has opted not to send any other people to dock at the station.

The Axiom-4 mission launch, the fourth private astronaut mission to the International Space Station, was canceled Tuesday night after SpaceX detected a liquid oxygen leak in its Falcon 9 rocket.

They might have hit a snag, but now they are ready for the glorious takeoff!The Axiom-4 mission, a SpaceX endeavor and a fully commercial human spaceflight, is all set to carry a diverse crew of four astronauts to the International Space Station (ISS).