Two astronauts are getting ready to fly a new spaceship built by Boeing, making this only the sixth time in history that NASA has flown a new passenger-grade spacecraft.

The pair, Barry "Butch" Wilmore and Sunita "Suni" Williams, are seasoned Navy test pilots who have each spent six months in space. They are expected to launch atop a United Launch Alliance Atlas V rocket, sending the new Starliner spacecraft to the International Space Station. 

Barring any bad weather or other last-minute...

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