Four pairs of SuperDraco engines power the Crew Dragon spacecraft's escape system. [credit: SpaceX ] Following a successful demonstration mission of its Crew Dragon spacecraft in March, SpaceX has been preparing that vehicle for a critical launch abort test this summer. During this test flight, after launching from Florida on a Falcon 9 booster, the Dragon will fire its powerful SuperDraco engines to show that the spacecraft can pull itself safely away from the rocket in case of a problem with the booster. On Saturday, as part of preparations for this abort test, the company experienced some sort of anomaly.