SpaceX fires up Falcon 9 rocket after booster engine swap

SpaceX confirms it has successfully fired up a Falcon 9 rocket after swapping two of its first stage (booster) engines, putting the company’s third US military GPS satellite launch back on track after about a month of delays. Known as GPS III Space Vehicle 04 (SV04), SpaceX was initially scheduled to launch the upgraded civil … Continue reading SpaceX fires up Falcon 9 rocket after booster engine swap