Butch Wilmore and Sunni Williams have spent nine months aboard the International Space Station following the failure of Boeing’s Starliner mission. Their rescue rocket has finally been launched.

SpaceX will try again Friday evening to launch the replacement crew to the International Space Station where the pair of NASA astronauts who flew up last summer on Boeing’s Starliner have

The delayed mission must reach the space station before the two astronauts who've been "stuck" in space can return home.