Elon Musk’s SpaceX had hoped to blast off its Starship vehicle on its inaugural test flight Monday, but ended up scrubbing the mission due to a “frozen pressure valve.” Musk himself has sought to lower expectations for the first launch attempt.

WSJ’s Micah Maidenberg explains the challenges Musk’s company faces getting Starship off — and back on — the ground.

0:00 Starship has had several crashes or explosions during uncrewed suborbital testing
0:47 Challenges surrounding SpaceX’s Raptor engines and Super Heavy booster
2:34 What to expect on Starship’s launch day

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