Yesterday, during a test of SpaceX’s Starship SN4, a leak developed which led to an explosion and the destruction of the test vehicle. There were no injuries. This test has nothing to do with today’s rescheduled Demo-2 Falcon manned launch, which is still on track to happen today (or tomorrow, if there’s more uncooperative weather).
You can see the original footage of the explosion itself on NASA ‘s YouTube channel and watch an analysis of the event by Scott Manley on his channel.
This is how learning happens when developing new space technology.