Q&A with Elon Musk, SpaceX’s founder and CEO

A SpaceX Dragon supply ship packed with nearly three tons of experiments, crew provisions and supplies will remain on the ground until at least Friday morning to allow more time for NASA flight controllers to troubleshoot a problem with an electrical distribution unit on the International Space Station.

SpaceX is readying a Falcon 9 rocket booster for launch Monday at Vandenberg Air Force Base, California, on a record-setting mission with 64 smallsats on-board that will also mark the launch provider’s first use of the same first stage for a third flight.

Watch as a Falcon 9 rocket with the first Crew Dragon capsule atop, briefly fired its engines for a crucial pre-launch test on Jan. 24, 2019.