This mission was the first crewed flight to launch from the United States since the end of the Space Shuttle program in 2011. It carried NASA astronauts Doug Hurley and Bob Behnken to the ISS.
This was the fist time payload fairing of an orbital rocket was reused in another flight. The fairing was from the ArabSat-6A mission in April earlier that year.
The first flight test of a Raptor engine occurred on 25 July 2019 at the SpaceX South Texas Launch Site. This was not a full-duration burn, but just a 22-second test.
SpaceX successfully launches Dragon 2, on top of the now human-rated Falcon 9. This was the first a private company sends a human-rated spacecraft to space.