Almost everyone knows what happened on that terrible day in January 1986.Early in the morning,the Challenger crew had a good breakfast and discussed their plans.They made sure they understood all of the work they would be doing during the flight.Later,they boarded a spacial van that carried them to the shuttle.The weather was rather cold,and some NASA officials wondered if they should put off the flight.After some discussion,they decided to go ahead.The Challenger took off over the Atlantic Ocean in Florida.Minutes later,it exploded in the air.All of the crew member,including Christa MacAuliffe,died in the explosion