Nasa and SpaceX are about to make history with the first launch of astronauts from US soil since the end of the Space Shuttle programme.
The launch will see Nasa astronauts Robert Behnken and Douglas Hurley sent to the International Space Station on board a SpaceX rocket.
It is the first time a private company has sent astronauts into space.
The mission, known as Demo-2, is officially the final test of SpaceX’s craft, the Crew Dragon capsule, which will be mounted on top of one of its Falcon 9 rockets.
