Yep, working for a Investment firm at the time, it came across the "ticker tape" machine, like an AP or Dow Jones news feed. The most traumatic "remember where I was" event, especially as a New Yorker was no doubt the 9/11 WTC attack.
I, too, worked as a stock-broker at that time, in Vancouver, B.C.
What I recall was the savage jest from the New York floor traders, “What does NASA stand for? - Need Another Seven Astronauts.”
That was within minutes. The sheer callousness stuck in my mind forever.