My wife and I were living on Maui at the time. I was in my office when my wife called and asked if I had heard about the plane hitting "a skyscraper" in New York. She was distraught and, before long, so was I.
I immediately went home to watch on TV and comfort her. By the time I got there, the radio news said the second tower was hit. We watched as people jumped out of the towers. And then one collapsed on itself and soon the second.
We watched all day and all night and I think she ended up comforting me. I knew we were at war.