NASA astronaut Jeanette Epps will join astronauts Sunita Williams and Josh Cassada as a crew member on the first operational flight of Boeing's CST-100 Starliner spacecraft to the International Space Station (ISS), the agency announced Tuesday. The six-month expedition, which is planned to launch in 2021, will make Epps the first Black woman to live and work in space for an extended period of time. 

"Jeanette Epps is the natural addition to NASA's Boeing Starliner-1 mission," Kathy Lueders, associate administrator for human exploration and operations at NASA headquarters, tells CNBC Make It in a statement. "She fully complements the other members of the first Boeing full duration crewed mission."