SpaceX's Starship rocket tumbled out of control and broke apart during a recent test, failing to release a series of mock satellites.Elon Musk, SpaceX's CEO, viewed it as an improvement despite the rocket's rapid disassembly.The setback occurred during the ninth demo flight of the 403-foot rocket launched from Texas.Despite the incident, SpaceX plans to increase the pace of future launches, aiming for a Starship liftoff every three to four weeks.