Caption: A J-2X engine built in Canoga Park is fitted into a test stand at Stennis Space Center.

Caption: A J-2X engine built in Canoga Park is fitted into a test stand at Stennis Space Center.

Pratt & Whitney Rocketdyne, a fixture in the San Fernando Valley for more than 50 years and a trailblazer in space exploration, now is facing the unknown head-on as its parent company officially placed the rocket engine maker on the selling block...

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