Boeing's Starliner: A Saga Marked By Setbacks

A decade ago NASA chose two companies, Boeing and SpaceX, to each develop a new spacecraft capable of transporting its astronauts to the International Space Station (Credit: AFP)

The decision to transfer the crew of Boeing's Starliner to a SpaceX mission after the spacecraft malfunctioned is just the latest twist in a long saga that has undermined the credibility of the US aerospace giant.

Here is a recap of the setbacks and delays on Starliner's journey to fly a crew to the International Space Station -- and how it was unable to bring them back again.