SpaceX's mammoth Starship rocket blasted off Friday on another test flight stretching halfway around the world, this time releasing 20 of the most advanced Starlinks. The previous Starship flight in May also experienced engine trouble, which prevented the booster from making a controlled return. "We got all the heat shield data we needed and then some!" The company already has used a pair of giant mechanical arms at the pad to capture a Starship booster. The latest test flight was delayed first by the July 16 launch abort, then again on Thursday by thick clouds from Tropical Storm Bertha.