SpaceX's iconic Falcon 9 rockets have been grounded for the third time in the last three months after part of the rocket uncontrollably crash-landed in the ocean.
The rocket was carrying a capsule to be used in the "rescue mission" that will eventually bring home the astronauts who have been stranded on the International Space Station (ISS) since June. The capsule itself made it to the ISS as planned, but other issues with the mission have prompted an investigation.
