Transcription: 7, 6, we go for main engine start. We have main engine start and ignition and lift off. And the F7 and America's first woman astronaut. And the shuttle has cleared the tower. Roger your roll, Challenger. Houston now controlling. Mission control confirms roll. Maneuver started. 20 seconds. Looks good. 25 seconds rollman over completed. Challenger 21 nautical miles in altitude. Standing by now for solid rocket booster separation.
(.mp3)
