WASHINGTON (Reuters) - 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.

The Starliner saga may not be over just yet. Despite a failed test flight that left a crew stranded in space, NASA still hasn’t given up on Boeing’s ill-fated spacecraft. Starliner may get another chance to transport astronauts to the International Space Station (ISS).

The Starliner crew was originally meant to stay on board the ISS for a week, but issues with Boeing's Starliner spacecraft severely delayed their return to Earth.

Four astronauts were all smiles Tuesday evening when they splashed down off the Florida coast on a SpaceX Dragon capsule. See photos.