Boeing's Starliner launch will be the 1st astronaut flight on an Atlas V rocket. How did NASA and ULA get it ready for crews? (exclusive)
United Launch Alliance 's Atlas V rocket has been in service for two decades, carrying missions like the Mars Reconnaissance Orbiter or the OSIRIS-REx sample return mission to asteroid Bennu since 2002. But as soon as today (May 6) its task is to send two NASA astronauts on board Boeing Starliner.