Assertion: space shuttle's mission | /r/HasProperty | two testing
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text: That new table would include SpaceX's Crew Dragon Demo 1 mission, Boeing's Starliner uncrewed demo mission, and the Soyuz MS-14 mission from 2019 (the first two testing a new capsule, the last testing Soyuz 2.1a booster for use with the Soyuz MS capsule.
text: Modified SR-71 Blackbird ejection seats and full pressure suits were used for the two-man crews on the first four shuttle orbital missions, which were considered test flights, but they were removed for the "operational" missions that followed.