If all goes according to plan, tomorrow, Saturday, May 19th, SpaceX will become the first commercial space flight company in history to head for the International Space Station. You can watch online, live, at SpaceX.com starting at 1:15 AM Pacific / 4:15 AM Eastern / 08:15 UTC. You can also follow SpaceX founder and CEO @elonmusk on Twitter. He'll live-tweet from mission control during launch.
And below, Miles and NewsHour host Hari Sreenivasan talk about the details of the mission, the engineering challenges and the other spaceflight companies vying for a chance at delivering cargo and people to low-Earth orbit.