Dec. 17 (UPI) -- Two Boeing Starliner astronauts, stranded at the International Space Station in June after what was supposed to be a weeklong test flight, are facing a new delay in their return trip to Earth, NASA revealed Tuesday.

Suni Williams and Butch Wilmore had been scheduled to return on a SpaceX Dragon flight in February, after they were forced to abandon Starliner due to helium leaks and thruster issues. The pair will now return to Earth no earlier than late March, 10 months after they originally launched, as they wait for their replacements to arrive at the ISS.

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