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KENNEDY SPACE CENTER, FLA. -- As seen from the Mobile Service Structure as it is being rolled back to its park site, the ASTP Saturn IB launch vehicle sits on its pedestal during the Countdown Demonstration Test. The test is a step-by-step dress rehearsal for the July 15 mission, which culminates with a simulated T-zero and launch with the stages of the rocket fueled as they will be on launch day. Following the simulated launch, the propellants will be offloaded. The terminal portion of the test will be repeated tomorrow with the ASTP astronauts Thomas Stafford, Vance Brand and Donald Slay…
