The most powerful rocket system ever constructed is headed for its next test - using a version of the vehicle that has been at the center of a series of explosive missteps and failures.

SpaceX called off Sunday’s launch attempt of the Starship rocket about 15 minutes from launch.

SpaceX wants to put the two-stage rocket's massive booster through its paces. On Sunday, it postponed the launch "to troubleshoot an issue with ground systems."