PASADENA, California — SpaceX says it remains at least “a couple of months” away from returning to flight following the Falcon 9 launch failure on a resupply mission to the International Space Station (ISS) on June 28, partially because the company’s accident investigation has taken longer than expected. The return to flight also will mark the first flight of the Falcon 9 powered by upgraded Merlin engines. Planned improvements include a 15% thrust boost for the ...


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