SpaceX’s Dragon Crew Capsule is set to launch from Cape Canaveral in a pivotal test flight for human-crewed missions that could happen as soon as this summer. The only passengers for this mission are a mannequin and some cargo for the International Space Station. It will dock on Sunday, stay for five days, and then depart before splashing down in the Atlantic Ocean on March 8.

This flight is a milestone for NASA and for SpaceX. NASA has been without a domestic carrier for their astronauts