SpaceX prepares for historic spacewalk on Polaris Dawn mission

SpaceX is counting down to two critical missions, including the first all-civilian spacewalk. This comes amidst NASA’s announcement to return stranded Boeing Starliner astronauts Butch Wilmore and Suni Williams to Earth on a SpaceX spacecraft. NBC News’ Marissa Parra reports. SpaceX is counting down to two critical missions, including the first all-civilian spacewalk. This comes amidst NASA’s announcement to return stranded Boeing Starliner astronauts Butch Wilmore and Suni Williams to Earth on a SpaceX spacecraft. NBC News’ Marissa Parra reports.  NBC News Science