The Boeing Starliner Launch Was Scrubbed. Here’s What Went Wrong.

The weather was looking favorable for the first crewed launch of Boeing Starliner—the commercial aerospace giant’s reusable spaceship designed to take astronauts to and from the International Space Station. The CST-100 Starliner launch, carrying NASA astronauts Butch Wilmore and Suni Williams, was slated for Monday night at about 10:30 p.m. Eastern time, but was scrubbed due to an ”oxygen relief valve on the Centaur Stage on the Atlas V.” Atlas V is the United Launch Alliance, or ULA, rocket that will eventually carry Starliner into orbit.