Whats Known About the SpaceX Crew Dragon Accident

During a series of engine tests of SpaceX's Dragon spacecraft this past Saturday, the vehicle experienced what the company has characterized as an "anomaly." Based upon an unauthorized leaked video of the accident, the company was counting down toward a firing of the Dragon's SuperDraco thrusters when the vehicle exploded. SpaceX has not validated the video, but it is consistent with verbal accounts of the failure that have been shared with Ars. After the accident, large dramatic clouds of orange smoke billowed above Landing Zone 1, where SpaceX conducted Saturday's engine tests. According to one source, the orange plumes were the result of between one and two tons of nitrogen tetroxide—the oxidizer used by Dragon's SuperDraco engines—burning at the location. …