As Elon Musk returns his focus to his businesses, one of his most important companies just had another setback: A SpaceX Starship rocket exploded in an immense fireball Wednesday during a routine ground test.

SpaceX's massive Starship spacecraft exploded into a dramatic fireball during testing in Texas late on Wednesday, the latest in a series of setbacks for billionaire Elon Musk’s Mars rocket program. The explosion occurred around 11 p.