Air Force, SpaceX ready to launch first Falcon Heavy
Sporting two, previously used side boosters, the SpaceX Falcon Heavy launch vehicle stands tall on Launch Complex-39A at NASA's Kennedy Space Center in the early morning hours of June 24, 2019. The four-hour launch window opens tonight at 11:30 p.m. Eastern, 8:30 p.m. Pacific. (Photo: SpaceX)

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