SpaceX Falcon 9 Rocket Lost Due to Internal Strut Failure

On June 28, 2015, disaster hit an uncrewed SpaceX Falcon 9 rocket 2 minutes 20 seconds after launch. Video made it clear something went wrong in the second stage, and at a press conference on Monday, CEO Elon Musk announced the most probable cause: a strut failure that led to the loss of the vehicle.

As fuel is used up during launch, high-pressure helium is fed into the liquid oxygen tank to maintain the pressure in that tank. The helium is kept at 5,500 PSI inside a bottle.

During launch,...

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