Transcription: We have main engine start, four, three, two, one, and liftoff, liftoff of the 25th Space Shuttle mission and it has cleared the tower. Challenger now heading downrange. Challenger, go at throttle up. Flight controllers here looking very carefully at the situation. Obviously a major malfunction. We have a report from the flight dynamics officer that the vehicle has exploded. Flight director confirms that we are looking at Checking with the recovery forces to see what can be done at this point.
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