Why SpaceX's private Inspiration4 mission to Earth orbit is so important

I get butterflies before every major rocket launch, and the fluttering is going to be particularly intense on Wednesday night (Sept. 15). That's when SpaceX's private Inspiration4 mission is scheduled to lift off, sending four astronauts on a three-day orbital jaunt. Crewed missions are especially anxiety-inducing, given the intrinsic danger of spaceflight, but there are extra white-knuckle layers to this one. More

(Source: Space.com - Sep 14)