It’s a Scrub for Boeing Starliner’s First Crewed Spaceflight
The first crewed spaceflight of Boeing’s Starliner was scrubbed tonight because of unexpected behavior in an oxygen relief valve on the rocket’s upper stage. NASA astronauts Butch Wilmore and Suni Williams were settling into their seats inside the spacecraft when the United Launch Alliance decided “out of an abundance of caution” to cancel the launch for tonight. ULA engineers will be working overnight to determine the status of the valve before deciding when they can try again.