Dawn breaks behind the Saturn IB launch vehicle during the countdown demonstration test on July 2, 1975. The mobile service structure was moved away from the vehicle for the test, which was a step-by-step dress rehearsal for the launch culminating in a simulated T-zero and launch.
Dawn breaks behind the Saturn IB launch vehicle during the countdown demonstration test on July 2, 1975. The mobile service structure was moved away from the vehicle for the test, which was a step-by-step dress rehearsal for the launch culminating in a simulated T-zero and launch. During the test, the stages of the Saturn IB rocket were fueled as they would be on launch day, July 15.Image Credit: NASA