Propellant leak delays SpaceX launch of private Ax-4 astronaut mission to the ISS

The SpaceX Falcon 9 rocket and Crew Dragon capsule that will fly the Ax-4 private astronaut mission stand on the pad at NASA's Kennedy Space Center in Florida.

Four private astronauts will have to wait a bit longer to get to space.

The four-person Ax-4 mission to the International Space Station (ISS) was supposed to lift off atop a SpaceX Falcon 9 rocket from NASA's Kennedy Space Center in Florida on Wednesday morning (June 11). But that's no longer the plan.