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The quartet had originally been slated to fly on a brand-new Crew Dragon being built by SpaceX for the mission. Delays in its construction due to battery issues, however, led NASA to initially postpone the launch to "late March," then ultimately to swap the mission's spacecraft to an already flight-proven Dragon. Now, instead of a shiny, new, yet-to-be-named Dragon, Crew-10 will launch aboard the veteran capsule Endurance, a spacecraft that's already flown three NASA crews to the space station and back.