SpaceX has had a lot of ups and downs lately. On Saturday, May 30, the company made history when their Crew Dragon spacecraft took off from the NASA Kennedy Space Center, carrying two astronauts to space. But just a day before, SpaceX engineers and ground crews watched their fourth Starship prototype (SN4) explode on its testbed during a static fire test, making it the fourth prototype in a row to be lost.
Source:
https://phys.org/news/2020-06-starship-prototypes-orbital-year.html