NASA decides to keep Sunita Williams and Butch Wilmore in space until February

NASA decided Saturday it's too risky to bring two astronauts back to Earth in Boeing's troubled new capsule, and they'll have to wait until next year for a ride home with SpaceX.

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What should have been a weeklong test flight for the pair will now last more than eight months.

The seasoned pilots have been stuck at the International Space Station since the beginning of June. A cascade of vexing thruster failures and helium leaks in the new capsule marred their trip to the space station, and they ended up in a holding pattern as engineers conducted tests and debated what to do about the flight back.