As Elon Musk pulls back from his political work in the US government, the SpaceX chief is turning his attention back to his rocket company, planning an all-hands-style X livestream to discuss his long-term goal of sending humans to Mars.

Elon Musk on Tuesday postponed by a few hours an expected update on SpaceX's plan to launch missions to Mars, saying it will take place after a Starship test flight scheduled for later in the day. He did not give a reason.