Increased tension between the U.S. and Russia following last week’s shootdown of a Malaysia Airlines 777 is adding fuel to U.S. efforts to consider an alternative to the Russian-made RD-180 rocket engine, the U.S. Air Force’s top space officer says. The RD-180 helps launch national security space assets into orbit by powering the first stage of the United Launch Alliance (ULA) Atlas V rocket.    “There is no indication right now that the supply will be ...


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