The SpaceX launch team began pumping super-cold liquid oxygen into the Falcon 9 rocket this morning as we continue to work toward liftoff at 10:01 a.m. EST. The Falcon’s Merlin engines combine the oxygen with refined kerosene fuel to generate thrust to lift the Dragon spacecraft and its 5,500 pounds of cargo off the launch pad and then accelerate it to an orbital velocity of about 17,500 mph.
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