STS-123 TCDT Video

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<p>http://www.youtube.com/watch?v=OlK2YXLGR54</p><div class="videoDescDiv expand-content"><span>The Terminal Countdown Demonstration Test, also known as TCDT provides shuttle crews and launch ground teams with an opportunity to participate in simulated countdown activities, including equipment familiarization and emergency training.</span>&nbsp;</div><p>&nbsp;</p> <div class="Discussion_UserSignature"> </div>