SPACEX launched its third crewed mission on Friday, recycling a rocket and spacecraft for the first time.
A team of four astronauts were propelled into orbit at 5:49am ET (10:49 BST) from Nasa's Kennedy Space Center in Cape Canaveral, Florida.
The company's Crew Dragon capsule, the Endeavour, lifted off atop a SpaceX Falcon 9 rocket. Both have been used on previous spaceflights.
The nearly 24-hour ride to the space station, which orbits some 250 miles (400 km) above Earth, had been set to begin on Thursday.
However, the flight was delayed for a day by unfavourable weather forecasts along the rocket's flight path.
How to track live as SpaceX launches NASA astronauts to ISS on recycled rocket and Crew Dragon spacecraft
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