SpaceX, tech billionaire Elon Musk's firm was the first to launch an all civilian mission
The all-amateur crew was the first to circle the world without a professional astronaut.
SpaceX is targeting a five-hour launch window aboard SpaceX's Falcon 9 rocket and Dragon spacecraft
Inspiration4 will blast off from NASA's Pad 39A at Kennedy Space Center in Florida on September 15.
The Inspiration4 crew will receive commercial astronaut training by SpaceX on the Falcon 9 launch