Do you remember if that FBI statement was read on-air by an ABC news national correspondent, or by Curtis or Kuby?
My memory is that is was a national correspondent, but I'm not sure.
I heard it on a Pennsylvania station, and it was definitely a national correspondent.
I vaguely remember Ron Kuby reporting at about 9:30 that the FBI had just issued a statement saying it was definitely not terrorism. It was already painfully obvious that that was incorrect, and the hosts noted it. Again, "just issued" could mean after the first hit, as the timeframe was very compressed. But I'll never forget those broadcasts. I think the WABC website (or George Weber's page there) has (or had) actual snippets if you have the stomach to relive them.