Nasa has launched astronauts int o space from US soil for the first time in nine years, with Doug Hurley and Bob Behnken on board SpaceX's Dragon capsule and Falcon 9 rocket.
The duo were due to lift off on Wednesday, but the mission was aborted less than 17 minutes before launch time over concerns that the event could trigger lightning.
If all goes as planned, the mission, named Demo-2, will see SpaceX become the first private company to send astronauts into space.
How to watch the SpaceX and Nasa rocket as it is launched into space
- You can watch the launch on YouTube here.
- NASA is also streaming the launch here.
Since ending its Space Shuttle programme in 2011, Nasa has depended on Russia's space agency Roscosmos to transport its astronauts to the space station.
In 2014, Nasa awarded SpaceX and Boeing contracts to provide crewed launch services to the space station as part of its Commercial Crew Programme.
According to Nasa, the aim of the Demo-2 mission is to show SpaceX's ability to ferry astronauts to the space station and back safely.
Around 10 minutes after lift-off, the rocket will separate into a first stage and a second stage.
The first stage will return to a SpaceX landing ship which will be stationed in the Atlantic Ocean off the coast of Florida, while the second part of the rocket continues the journey with the Crew Dragon.
Once in orbit, the Crew Dragon will separate from the second stage and travel at around 17,000mph.
The craft is expected to rendezvous and dock, with the space station on Sunday at 3.30pm UK time.
