SpaceX and NASA detail cause of Dragon test failure, crewed flight this year looks 'increasingly difficult'

SpaceX held a press conference on Monday to discuss the results of a months-long investigation conducted by itself and NASA into an anomaly that took place during a static fire test in April. The investigation found that the "anomaly" that occurred during the test was the result of oxidizer mixing with the helium component of the SuperDraco rocket engine propellant system at very high pressure. On April 20, SpaceX held an abort engine test for a prototype of its Crew Dragon vehicle (which had been flown previously for the uncrewed ISS mission).