![]() ![]() ![]() Before this point, the NASA test director will perform a launch readiness poll of the shuttle launch team. ![]() Īt the T-minus 9 minute mark, the clock will typically enter a 45-minute hold. At the end of these "built-in holds," the countdown clock will resume unless NASA encounters any technical glitches. At several predetermined points during the launch countdown, NASA will pause the clock as part of standard procedure to give the ground teams time to resolve any unexpected issues that may crop up. ![]()
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