All due respect, but my husband ( now retired) was one of the engineers in charge of the TDRS Satellite that Challenger hoped to deploy
The trajectory was to the southeast because it was headed for a geosynchronous orbit.
And yes, it was one of Florida’s coldest days......
Thanks for the correction. My first thought was that the IUS had exploded. Never thought there would be a problem with the launch vehicle. But there’s no such thing as a ‘routine’ rocket launch. Each one is unique. Sad day today. It hurts thinking about it.