In 1986, space shuttle Challenger lifts off from the Kennedy Space Center at Cape Canaveral, Florida, carrying Francis R. Scobee as commander, Michael J. Smith as pilot, mission specialists Judith A. Resnik, Ronald E. McNair and Ellison Onizuka, and 'teacher in space' Christa McAuliffe. The weather at Canaveral is considerably warmer than it had been on their original liftoff date of Jan. 28. Its mission, officially dubbed STS-51-L, will prove uneventful except for the publicity surrounding Ms. McAuliffe's presence as the first civilian in orbit, the so-called teacher in space.