Boeing Starliner undocks from space station, heads back to Earth unmanned as crew stays behind

Boeing’s Starliner capsule undocked from the International Space Station Friday evening and headed back to New Mexico without any crew. 

Butch Wilmore and Suni Williams will remain behind at the space station until February. They are expected to return to Earth with a SpaceX crew that will likely launch for the ISS later this month with two empty seats on what NASA jokingly called an "orbital Uber" Friday. 

Sending the astronauts back on Starliner was determined to be too risky by...