CNN —SpaceX just attempted to ignite all 33 engines in a test fire of its gargantuan Super Heavy rocket booster. The Super Heavy booster started its engines for less than 10 seconds while still strapped to the launchpad. Only 31 engines were lit, however, SpaceX CEO Elon Musk confirmed Thursday in a tweet. SpaceX conducted the test fire without the Starship spacecraft mounted on top of the booster. It should be noted that SpaceX is still awaiting a license from the Federal Aviation Administration to move forward with an orbital flight test.

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