I've often heard people talking about where they were and what they were doing when they heard that President Kennedy had been assassinated.
It's a moment that is engraved on people's minds all across the world.
Some say it was the beginning of a new age of lost innocence or the end of a dream and so on.
At 8 years old I was only dimly aware of it because my parents were glued to the (new) television all night for fresh bulletins and breaking news.
To be honest I can't remember where I was or what I was doing. I can't even remember my mum and dad telling me, though they must have.
The next night, however, I know exactly where I was and what I was doing.
The first episode of Doctor Who "An Unearthly Child" was shown, part of a four part debut, with Williams Hartnell as the Doctor, and I was behind the sofa because it was so scary.
Since then my interest in international politics has grown to become an obsession but I still watch Doctor Who.
On the sofa rather than behind it, although it's still pretty scary at times