↑ Davenport, Christian (ngày 15 tháng 9 năm 2021). “SpaceX makes history by launching Inspiration4, first all-civilian crew, to orbit”. The Washington Post. Lưu trữ bản gốc ngày 16 tháng 9 năm 2021. Truy cập ngày 16 tháng 9 năm 2021. The Inspiration4 mission may be the first time a spaceflight crew is comprised entirely of civilians – nongovernment astronauts. There has been a long history of ordinary citizens going to space. In fact, that was NASA's goal at the beginning of the space shuttle era – to fly regular people on a routine basis
↑ ngày 15 tháng 9 năm 2021, 20:02:56 Eastern Daylight Time (EDT)
↑ Many sources use the term "all-civilian". The Washington Post clarified its use of this term in one of its headlines when it later said "comprised entirely of civilians – nongovernment astronauts".[6]
↑ STS-2 Commander Joe Engle was a NASA space flight rookie, but had been awarded U.S. Air Force Astronaut wings for passing 50 mi (80 km) while flying the X-15rocket plane.
