Elon Musk’s SpaceX is in the midst of a 15th test-flight of its Starship rocket. The company was hoping to pull off the first-ever “double catch” – with both the booster and the ship itself coming safely back down to earth. Instead, an unspecified problem forced the company to abort recovery of the booster, which was diverted from its return path and crashed down into the Gulf of Mexico. Analysis by journalist Frédéric Castel, based in Bosa Chica, Texas, USA.