Transcription: We have main engine start. Two, one, solid rocket ignition and liftoff, liftoff of Endeavour on America's 50th space shuttle flight. Houston now controlling. Houston, Endeavour switch you into roll. Roger roll Endeavour. Roll maneuvers complete aboard Endeavour. The orbiter's now in a heads-down position on course for a 57 degree, 160 nautical mile orbit.
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