Boeing's troubled Starliner capsule that left two NASA astronauts on the International Space Station last year may need to fly a third uncrewed test flight before it carries astronauts again, agency officials said as the spacecraft's first crew had to return to Earth on a SpaceX capsule this week.

NASA is considering another test flight of Boeing's Starliner vehicle, with or without a crew on board. The Starliner saga may not be over just yet. Despite a failed test flight that left a crew stranded in space,