Boeing's Starliner spacecraft is set to launch on Monday night from Cape Canaveral, carrying two NASA astronauts on its first crewed test flight to the International Space Station.  The mission marks a major milestone for Boeing's commercial crew program after years of delays and setbacks in developing Starliner. Boeing aims to prove Starliner is safe to fly astronauts after its 2019 uncrewed orbital flight test encountered software issues. Astronauts Suni Williams and Butch Wilmore will test and evaluate Starliner's systems and ride it to and from the ISS.