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. 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 trip back. After almost three months, the decision finally came down from NASA’s highest ranks on Saturday. Butch Wilmore and Suni Williams will come back in a SpaceX spacecraft in February. Their empty Starliner capsule will undock in early September and attempt to return on autopilot. As Starliner’s test pilots, the pair should have overseen this critical last leg of the journey, with touchdown in the U.S. desert. “A test flight by nature is neither safe nor routine,” said NASA Administration Bill Nelson. “And so the decision ... is a commitment to safety.”