CNN  —  It was a typical balmy afternoon across the tropical islands that lie southeast of Florida, where tens of thousands of tourists flock this time of year for winter break. But on January 16, just after sundown, a spacecraft erupted into a ball of flames over the North Atlantic Ocean near Turks and Caicos Islands. The upper stage of a SpaceX Starship launch system, the most powerful rocket ever built, had broken apart minutes after liftoff from South Texas during its seventh test flight,