Yes I remember too - I was at work, one of the girls had a phone call from home, telling her a plane had crashed into one of the twin towers. We were all so shocked, but of course thought it was an accident. Someone found a TV and we had it on for the rest of the day. Just couldn't believe it.
When JFK was assassinated, I was on top of a London bus going along the Old Kent Road. I was meeting friends, it was early evening. We stopped by a TV shop, and all the TVs had the same footage, and I was puzzled as to what had happened. When I found out I was so shocked and sad.